{"id":20523,"date":"2026-08-04T19:47:19","date_gmt":"2026-08-04T17:47:19","guid":{"rendered":"https:\/\/migflug.com\/?page_id=20523"},"modified":"2026-08-08T12:37:23","modified_gmt":"2026-08-08T10:37:23","slug":"bucker-bu-131-jungmann","status":"publish","type":"page","link":"https:\/\/migflug.com\/pt\/aircraft\/bucker-bu-131-jungmann\/","title":{"rendered":"B\u00fccker B\u00fc 131 Jungmann \u2014 History, Specs, Photos &#038; Stories"},"content":{"rendered":"<div id=\"mfam\">\n<style> @import url('https:\/\/fonts.googleapis.com\/css2?family=Lora:ital,wght@0,400;0,500;1,400;1,500&display=swap'); body.page-id-20523 h1.entry-title.main_title{display:none} body.page-id-20523 #main-content .container{padding-top:0} body.page-id-20523 #left-area{padding-bottom:0} html{overflow-x:hidden} body.page-id-20523{overflow-x:hidden} body.page-id-20523 #sidebar{display:none} body.page-id-20523 #left-area{width:100%!important;float:none;padding:0} #mfam{width:100vw;margin-left:calc(50% - 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.tag{font-size:11.5px} #mfam .mscard details summary{font-size:14px} #mfam .mscard details .full{font-size:15px} #mfam .ecard h3{font-size:20px} #mfam .ecard p{font-size:15.5px} #mfam .spectable dt,#mfam .spectable dd{font-size:15px} #mfam .tl-item h3{font-size:18px} #mfam .tl-item p{font-size:15.5px} #mfam .gal figcaption{font-size:14.5px} #mfam .gal figcaption span{font-size:12.5px} #mfam .chip{font-size:13.5px} #mfam .stat span{font-size:11.5px} #mfam .flycard b{font-size:17px} #mfam .flycard span{font-size:13.5px} #mfam .rel .rh{font-size:20px} #mfam .rel .rp{font-size:15px} #mfam .rel .go{font-size:14px} #mfam .srclist{font-size:15px} #mfam .srclist li span{font-size:13.5px} #mfam .finenote{font-size:13.5px} #mfam .maplegend span{font-size:13.5px} #mfam .vid p{font-size:14px} #mfam .cstat span{font-size:12.5px} #mfam .btn{font-size:15px}  #mfam .spectable dt,#mfam .spectable dd{font-family:'Gilroy regular',Helvetica,Arial,sans-serif;font-weight:normal} #mfam .spectable dd{color:#0d1117}  #mfam .fico img{height:72px;width:auto;max-width:192px;filter:drop-shadow(0 0 2px rgba(220,232,248,.5))} #mfam .flycard .fico{height:76px} #mfam .btn{font-size:17px;padding:18px 40px} span.chip{cursor:default} \/*mobfix1*\/@media(max-width:767px){#mfam .hero{height:auto;min-height:0;max-height:none;padding-top:96px}#mfam .car{padding-top:60px}#mfam .cbtn{top:0;bottom:auto}#mfam .cbtn.p{left:auto;right:52px}#mfam .cbtn.n{right:0}}<\/style>\n<p> <script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Can I fly in a B\u00fccker B\u00fc 131 Jungmann?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. You can fly in a genuine open-cockpit B\u00fccker Jungmann biplane from Grenchen, Switzerland with MiGFlug's partner GoAviator, which offers a vintage-biplane sightseeing and aerobatic experience in a two-seat B\u00fc 131. The passenger rides in the front cockpit. Flights cost roughly 430 to 790 CHF depending on duration.\"}},{\"@type\":\"Question\",\"name\":\"What is the difference between the B\u00fc 131 Jungmann and the B\u00fc 133 Jungmeister?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The B\u00fc 131 Jungmann is the two-seat primary trainer; the B\u00fc 133 Jungmeister is a smaller single-seat aerobatic development. Only the two-seat Jungmann can carry a passenger, which is why every fly-in-a-B\u00fccker experience uses a B\u00fc 131.\"}},{\"@type\":\"Question\",\"name\":\"When did the B\u00fccker Jungmann first fly, and who designed it?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The prototype B\u00fc 131 first flew on 27 April 1934. It was designed by the Swedish engineer Anders J. Andersson for B\u00fccker Flugzeugbau near Berlin.\"}},{\"@type\":\"Question\",\"name\":\"How many B\u00fccker Jungmanns were built?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Thousands, across German production and licence lines in Spain, Japan, Switzerland, Hungary, Czechoslovakia and Yugoslavia. No exact total exists in the public record and estimates vary; Spain built the CASA 1.131 in large numbers into the 1960s.\"}},{\"@type\":\"Question\",\"name\":\"What engine does the B\u00fccker B\u00fc 131 Jungmann use?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A small Hirth inverted air-cooled inline-four: the HM 60R of about 80 hp in the B\u00fc 131A and the HM 504 of about 105 hp in the B\u00fc 131B. Many Spanish CASA 1.131s were re-engined with ENMA Tigre or Continental engines.\"}},{\"@type\":\"Question\",\"name\":\"What are the Jungmann's licence-built versions?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The Jungmann was licence-built as the CASA 1.131 in Spain, the Kokusai Ki-86 and Kyushu K9W Momiji in Japan, the Aero C-4\/C-104 and Tatra T-131 in Czechoslovakia, and by Dornier\/Doflug in Switzerland; Hungary and Yugoslavia built or operated it too.\"}},{\"@type\":\"Question\",\"name\":\"Is the B\u00fccker Jungmann still flying today?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Hundreds remain airworthy worldwide and it is a much-loved vintage aerobatic type. You can book a passenger flight in one via GoAviator from Grenchen, Switzerland.\"}}]}<\/script> <\/p>\n<header class=\"hero\">\n<div class=\"hero-media\"><img data-opt-id=1625960605  data-opt-src=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:78--.b845\/w:1608\/h:1080\/q:96\/f:best\/https:\/\/migflug.com\/wp-content\/uploads\/2026\/08\/bucker-bu-131-jungmann-restored-biplane.jpg\"  src=\"data:image/svg+xml,%3Csvg%20viewBox%3D%220%200%202048%201375%22%20width%3D%222048%22%20height%3D%221375%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Crect%20width%3D%222048%22%20height%3D%221375%22%20fill%3D%22transparent%22%2F%3E%3C%2Fsvg%3E\" alt=\"Restored B\u00fccker B\u00fc 131 Jungmann open-cockpit biplane\" loading=\"eager\" decoding=\"async\"><\/div>\n<div class=\"wrap hero-in\">\n<div class=\"crumb\"><a href=\"https:\/\/migflug.com\/aircraft\/\">Aircraft Museum<\/a> \u203a <span>Primary Trainer<\/span> \u203a <span>B\u00fc 131 Jungmann<\/span><\/div>\n<h1>B\u00fccker B\u00fc 131<br \/><em>\u201cJungmann\u201d<\/em><\/h1>\n<p class=\"sub\">The little open-cockpit biplane that taught the world to fly \u2014 Germany\u2019s classic 1930s primary trainer, licence-built on four continents and still looping over airfields nearly a century later. And this is one of the very few historic types you can still book a flight in.<\/p>\n<div class=\"statstrip\">\n<div class=\"stat\"><b>1934<\/b><span>First flight \u00b7 designed by Anders Andersson<\/span><\/div>\n<div class=\"stat\"><b>~80\u2013105 hp<\/b><span>Hirth inverted inline-4<\/span><\/div>\n<div class=\"stat\"><b>Thousands<\/b><span>Built across Germany &amp; six licences<\/span><\/div>\n<div class=\"stat\"><b>1936\u20131971<\/b><span>Swiss Air Force service life<\/span><\/div>\n<\/div>\n<\/div>\n<div class=\"credit\">Photo: Gzzz \u00b7 CC BY-SA 3.0<\/div>\n<\/header>\n<div class=\"wrap\">\n<div class=\"chips\"><span class=\"chip\"><b>Role<\/b>Two-seat primary &amp; aerobatic trainer<\/span><span class=\"chip\"><b>Era<\/b>Interwar &amp; WWII (1930s\u201340s)<\/span><span class=\"chip\"><b>Engine<\/b>Hirth HM 60 \/ HM 504 inline-4<\/span><span class=\"chip\"><b>Origin<\/b>Germany \u00b7 B\u00fccker Flugzeugbau<\/span><span class=\"chip\"><b>Status<\/b>Flyable \u00b7 hundreds airworthy<\/span><a class=\"chip fly\" href=\"#faq\">Flyable \u2014 book a Jungmann flight<\/a><\/div>\n<\/div>\n<section>\n<div class=\"wrap\">\n<div class=\"kicker\">The Story<\/div>\n<h2>B\u00fccker B\u00fc 131 Jungmann: the biplane that taught the world to fly<\/h2>\n<div class=\"cols\">\n<div>\n<p>In 1932 the former German naval aviator <strong>Carl Clemens B\u00fccker<\/strong> came home after more than a decade abroad. During the years when the Treaty of Versailles had all but strangled German aviation, he had gone to <strong>Sweden<\/strong>, where he ran the aircraft manufacturer Svenska Aero and learned his trade building military machines for a foreign air force. When he returned to Germany he set up <strong>B\u00fccker Flugzeugbau<\/strong> at Berlin-Rangsdorf, and he did not come alone: he brought with him a brilliant young Swedish engineer, <strong>Anders J. Andersson<\/strong>, who would design almost everything the company became famous for.<\/p>\n<p>Their very first product, first flown on <strong>27 April 1934<\/strong>, was the B\u00fc 131 Jungmann \u2014 German for \u201cyoung man,\u201d the beginner. It was tiny, light and beautifully proportioned: a single-bay biplane with a <strong>welded steel-tube fuselage<\/strong>, wooden wings, fabric covering and two open cockpits in tandem. Power came from a small <strong>inverted air-cooled inline engine<\/strong>, a Hirth of around 80 to 105 horsepower, mounted upside-down so the cylinders hung below the crankshaft and the student had a clean view over the nose.<\/p>\n<p>It could not fly fast, and it was never meant to. What the Jungmann did supremely well was <strong>teach<\/strong>. Its controls were light and perfectly harmonised, it gave honest warning before a stall, and it was stressed for aerobatics so a pupil could safely be shown loops, rolls and spins. It rewarded good hands and gently exposed sloppy ones \u2014 exactly what a first aeroplane should do. Andersson had built, in effect, the perfect primary trainer, and the aviation world noticed almost at once.<\/p>\n<p>As Germany rapidly rebuilt its air arm through the mid-1930s, the Jungmann became the <strong>standard primary trainer of the Luftwaffe<\/strong> and of the civil <em>Deutsche Verkehrsfliegerschule<\/em> flying schools. Tens of thousands of pilots took their first lessons, first solos and first spins in one. Its success also spawned a smaller, hotter single-seat sibling \u2014 the <strong>B\u00fc 133 Jungmeister<\/strong> (\u201cyoung master\u201d) \u2014 which went on to dominate international aerobatic competition and cemented the B\u00fccker name.<\/p>\n<p>Then the design travelled. The Jungmann was <strong>licence-built across Europe and Asia<\/strong> on a scale few trainers have ever matched. <strong>Spain<\/strong> produced it as the <strong>CASA 1.131<\/strong> in very large numbers and kept the line open into the 1960s, many re-engined with ENMA Tigre or Continental flat-fours. <strong>Japan<\/strong> built it as the Army <strong>Kokusai Ki-86<\/strong> and the Navy Kyushu K9W Momiji. <strong>Switzerland<\/strong> assembled it at Dornier\/Doflug in Altenrhein for its own air force; <strong>Czechoslovakia<\/strong> continued it post-war as the <strong>Aero C-4 \/ C-104<\/strong> and <strong>Tatra T-131<\/strong>; and Hungary and Yugoslavia built or flew it too.<\/p>\n<p>Total production across all those lines runs into the <strong>thousands<\/strong> \u2014 the exact figure is genuinely uncertain and quoted very differently by almost every source, which is why any single number should be read as an estimate. During the Second World War the type stayed overwhelmingly in the training role, though individual aircraft were pressed into secondary duties: liaison and communications flying, glider-towing, and light observation. It was a teacher, not a warplane, and its documentary photographs wear the plain training markings of the era.<\/p>\n<p>Most trainers are forgotten the instant their students graduate. The Jungmann was not. Its sweet handling and gentle aerobatic manners turned it into a <strong>cult classic of the vintage movement<\/strong>, and the sheer number built \u2014 especially the late Spanish CASAs \u2014 meant plenty survived to be restored. Today <strong>hundreds remain airworthy<\/strong>, from Switzerland to California to New Zealand, flown by pilots who fall in love with the same qualities that made it such a fine teacher ninety years ago.<\/p>\n<p>And it is one of the very few pre-war types the public can still <strong>fly in<\/strong>. MiGFlug\u2019s partner brand <strong>GoAviator<\/strong> offers passenger flights in a genuine open-cockpit Jungmann from <strong>Grenchen, Switzerland<\/strong> \u2014 you ride in the front cockpit in leather cap and goggles and choose sightseeing, aerobatics, or both. The aircraft is a Swiss Doflug-built machine from 1939; the details are below.<\/p>\n<p>The company itself became a fixture of German aviation, moving to a purpose-built factory at <strong>Rangsdorf<\/strong> south of Berlin, where the Jungmann was joined on the line by the Jungmeister and, from 1939, the low-wing <strong>B\u00fc&nbsp;181 Bestmann<\/strong> monoplane trainer. For a firm that had started from almost nothing in 1932, it was a remarkable rise \u2014 built entirely on the reputation of aircraft that were a joy to fly rather than on speed or armament.<\/p>\n<p>Defeat in 1945 ended German aircraft production for a decade, but by then the Jungmann had long since escaped Germany\u2019s borders. The Spanish, Swiss, Czech and other lines kept building and flying it, and when the vintage-aircraft movement gathered pace from the 1960s onward the type was perfectly placed to be rediscovered: cheap to run by warbird standards, fully aerobatic, and available in real numbers thanks to all those licence machines. What had been a humble military teaching tool became one of the most sought-after classic biplanes in the world.<\/p>\n<\/div>\n<div class=\"pull\">A trainer so good its students never quite let it go \u2014 ninety years on, hundreds still fly.<cite><b>The Jungmann<\/b> \u2014 the aeroplane that taught the world to fly<\/cite><\/div>\n<\/div>\n<div class=\"deepset\">\n<details class=\"deep\">\n<summary><span class=\"no\">01<\/span><span class=\"t\">The B\u00fccker B\u00fc 131 Jungmann\u2019s two-seat layout: why it, not the Jungmeister, carries passengers today<\/span><\/summary>\n<div class=\"a\">\n<p>B\u00fccker built two famous biplanes that look almost identical to a casual eye, and they are constantly confused. The <strong>B\u00fc 131 Jungmann<\/strong> is the <strong>two-seat<\/strong> primary trainer \u2014 student in the front cockpit, instructor behind. The <strong>B\u00fc 133 Jungmeister<\/strong> (\u201cyoung master\u201d) is a smaller, more powerful <strong>single-seat<\/strong> aerobatic development of it. Because the Jungmeister has only one seat, it physically cannot carry a passenger \u2014 so every genuine \u201cfly in a B\u00fccker biplane\u201d experience is, necessarily, a two-seat Jungmann.<\/p>\n<p>GoAviator\u2019s Grenchen aircraft is exactly that: a two-seat <strong>B\u00fc 131 Jungmann built under licence in 1939 by Doflug (Dornier-Werke) at Altenrhein<\/strong>, Switzerland, carrying the Swiss military registration <strong>A-66<\/strong> (works number 79). The passenger rides up front while the pilot flies from the rear seat. GoAviator\u2019s own listing labels the machine a \u201cJungmann\u201d \u2014 the two-seater \u2014 but writes the type number as \u201cB\u00fc 133,\u201d which is simply an error: a B\u00fc 133 Jungmeister could never take a passenger. What matters is that this is the two-seat B\u00fc 131, the classic 1930s trainer this page is about.<\/p>\n<\/div>\n<\/details>\n<\/div>\n<\/div>\n<\/section>\n<hr class=\"divider\">\n<section>\n<div class=\"wrap\">\n<div class=\"kicker\">Design &amp; Engineering<\/div>\n<h2>What makes the B\u00fccker B\u00fc 131 Jungmann special<\/h2>\n<div class=\"cards3\">\n<div class=\"ecard\">\n<div class=\"num\">01<\/div>\n<h3>A featherweight built like a bridge<\/h3>\n<p>The Jungmann\u2019s fuselage is a <strong>welded steel-tube frame<\/strong> under fabric, with fabric-covered wooden wings braced by a single set of struts and flying wires. Empty it weighs only around <strong>390&nbsp;kg<\/strong>. That combination \u2014 light, torsionally strong and fully stressed for aerobatics \u2014 is exactly why the type is still trusted to loop and roll after ninety years, and why so many airframes have survived to be rebuilt.<\/p>\n<\/div>\n<div class=\"ecard\">\n<div class=\"num\">02<\/div>\n<h3>The upside-down Hirth engine<\/h3>\n<p>Power came from a small <strong>Hirth inverted inline-four<\/strong>: the HM&nbsp;60R of about <strong>80&nbsp;hp<\/strong> in the B\u00fc&nbsp;131A, and the definitive HM&nbsp;504 of about <strong>105&nbsp;hp<\/strong> in the B\u00fc&nbsp;131B. Mounting it inverted put the cylinders low and the propeller shaft high, giving a slim nose and an <strong>unobstructed view forward<\/strong> \u2014 a real advantage when a student is learning to judge a three-point landing in a taildragger.<\/p>\n<\/div>\n<div class=\"ecard\">\n<div class=\"num\">03<\/div>\n<h3>Andersson\u2019s magic handling<\/h3>\n<p>Designer <strong>Anders Andersson<\/strong> gave the Jungmann light, beautifully matched controls and honest stall behaviour. Pilots consistently rank it among the most <strong>delightful biplanes ever built<\/strong>. The same aerodynamics, shrunk to a single seat and given more power, produced the <strong>B\u00fc&nbsp;133 Jungmeister<\/strong> \u2014 a world-championship aerobatic star of the 1930s and proof of how good the basic design was.<\/p>\n<\/div>\n<\/div>\n<div class=\"deepset\">\n<details class=\"deep\">\n<summary><span class=\"no\">02<\/span><span class=\"t\">The B\u00fccker B\u00fc 131 Jungmann\u2019s Hirth engine: the inverted inline-four explained<\/span><\/summary>\n<div class=\"a\">\n<p>The Jungmann was built around the Hirth family of <strong>inverted, air-cooled, inline four-cylinder<\/strong> engines. The prototype and early B\u00fc&nbsp;131A used the <strong>Hirth HM&nbsp;60R<\/strong> of roughly 80&nbsp;hp; the definitive B\u00fc&nbsp;131B adopted the larger <strong>Hirth HM&nbsp;504<\/strong> of about 105&nbsp;hp, which gave crisper aerobatic performance. \u201cInverted\u201d means the cylinders point downward from the crankcase \u2014 a layout that keeps the propeller thrust-line high and the nose slim, improving forward view and ground clearance. It is a modest, unstressed engine that runs happily on ordinary fuel, which is part of why the type is still practical to operate. Many surviving airframes \u2014 especially the Spanish <strong>CASA 1.131<\/strong>s \u2014 were re-engined over the years with the Spanish ENMA Tigre or with American <strong>Continental<\/strong> and Lycoming flat-fours, so two \u201cidentical\u201d Jungmanns can sound and fly noticeably differently.<\/p>\n<\/div>\n<\/details>\n<details class=\"deep\">\n<summary><span class=\"no\">03<\/span><span class=\"t\">The B\u00fccker B\u00fc 131 Jungmann\u2019s structure: fabric, steel tube and why it lasts<\/span><\/summary>\n<div class=\"a\">\n<p>The Jungmann is a textbook example of 1930s light-aircraft construction. The fuselage is a <strong>welded chrome-molybdenum steel-tube truss<\/strong>, faired to shape with wooden formers and stringers and then covered in doped fabric. The wings are <strong>wooden two-spar structures<\/strong>, also fabric-covered, arranged as an equal-span single-bay biplane cell with N-struts and bracing wires. This makes the aircraft light and immensely repairable: a damaged tube can be cut out and re-welded, ribs can be rebuilt, and fabric can simply be renewed. It is that repairability \u2014 rather than any exotic material \u2014 that has kept so many Jungmanns flying for the better part of a century. The trade-off is maintenance: fabric ages, wood must be protected from moisture, and airframes need regular, skilled attention to stay airworthy.<\/p>\n<\/div>\n<\/details>\n<details class=\"deep\">\n<summary><span class=\"no\">04<\/span><span class=\"t\">The B\u00fccker B\u00fc 131 Jungmann as a trainer: two open cockpits and how it taught pilots<\/span><\/summary>\n<div class=\"a\">\n<p>The whole point of the Jungmann was <strong>ab-initio training<\/strong> \u2014 taking someone who had never flown and turning them into a pilot. Its two open cockpits sit in tandem, student in front and instructor behind, connected by a simple speaking-tube or, later, an intercom. The open layout was deliberate: it immersed the pupil in the sensations of flight and let the instructor watch head and hand movements directly. Because the aircraft was fully aerobatic yet forgiving, a syllabus could progress from straight-and-level and circuits all the way through spinning and aerobatics on the same airframe. Through the mid-1930s and into the war it was the first type flown at German flying schools, and the same qualities made it a favourite basic trainer for a dozen other air forces that bought or built it.<\/p>\n<\/div>\n<\/details>\n<details class=\"deep\">\n<summary><span class=\"no\">05<\/span><span class=\"t\">The B\u00fccker B\u00fc 131 Jungmann\u2019s licence variants: CASA 1.131, Ki-86, Aero C-104 and the Swiss Doflug machines<\/span><\/summary>\n<div class=\"a\">\n<p>Few trainers were copied as widely as the Jungmann. <strong>Spain<\/strong> built it as the <strong>CASA 1.131<\/strong> in large numbers and kept the line running into the <strong>1960s<\/strong>, re-engining many with ENMA Tigre or, later, Continental engines \u2014 which is why a very large share of surviving \u201cJungmanns\u201d are actually Spanish CASAs. <strong>Japan<\/strong> licence-built it as the Army <strong>Kokusai Ki-86<\/strong> and the Navy <strong>Kyushu K9W Momiji<\/strong> (\u201cmaple leaf\u201d). <strong>Switzerland<\/strong> assembled it at <strong>Dornier\/Doflug, Altenrhein<\/strong>, for the Swiss Air Force \u2014 the source of GoAviator\u2019s aircraft. <strong>Czechoslovakia<\/strong> continued production after the war as the <strong>Aero C-4 \/ C-104<\/strong> and <strong>Tatra T-131<\/strong>, and Hungary and Yugoslavia built or operated it as well. Because the variants differ in engine, equipment and detail fit, headline performance and production figures vary from source to source \u2014 treat any single total as an estimate rather than a hard fact.<\/p>\n<\/div>\n<\/details>\n<details class=\"deep\">\n<summary><span class=\"no\">06<\/span><span class=\"t\">The B\u00fccker B\u00fc 131 Jungmann in the air: what pilots say it is like to fly<\/span><\/summary>\n<div class=\"a\">\n<p>Pilots who fly the Jungmann tend to run out of superlatives. The controls are light and beautifully matched, the aircraft \u201ctalks\u201d to you through the stick, and it will loop, roll and spin cleanly on modest power while remaining forgiving of a beginner. It is <strong>slow<\/strong> \u2014 cruising around 170&nbsp;km\/h \u2014 and in an open cockpit you feel every knot of it: the slipstream on your face, the smell of the engine, the horizon tipping over the top wing. That sensory honesty, not raw performance, is the whole point, and it is precisely what a modern passenger experiences on the Grenchen flight. The lineage shows, too: the single-seat Jungmeister derived from it was a <strong>world-championship aerobatic aircraft<\/strong>, and the Jungmann carries the same delightful DNA in a gentler, two-seat form.<\/p>\n<\/div>\n<\/details>\n<details class=\"deep\">\n<summary><span class=\"no\">07<\/span><span class=\"t\">The B\u00fccker B\u00fc 131 Jungmann you can fly: the 1939 Swiss Doflug airframe A-66 at Grenchen<\/span><\/summary>\n<div class=\"a\">\n<p>The specific aircraft MiGFlug\u2019s partner <strong>GoAviator<\/strong> flies is a genuine <strong>1939 B\u00fc&nbsp;131 Jungmann built under licence by Doflug (Dornier-Werke) at Altenrhein<\/strong>, Switzerland \u2014 works number 79, originally delivered to the Swiss Air Force as <strong>A-66<\/strong>. Switzerland operated its Doflug-built Jungmanns as primary trainers from <strong>1936 until 1971<\/strong>, an extraordinary 35-year career, after which many passed straight into private and warbird hands. This machine is now a lovingly maintained warbird flown from <strong>Grenchen<\/strong>, with the passenger seated in the front cockpit. You can choose gentle sightseeing over the Swiss Mittelland and Jura, a full aerobatic sequence \u2014 loops, rolls, inverted flight, Immelmanns, spins \u2014 or a mix, with flights of roughly 30 or 60 minutes priced around <strong>430\u2013790 CHF<\/strong>. It is one of the only ways left to experience a pre-war B\u00fccker biplane exactly as its first students did.<\/p>\n<\/div>\n<\/details>\n<details class=\"deep\">\n<summary><span class=\"no\">08<\/span><span class=\"t\">B\u00fccker Flugzeugbau and Anders Andersson: the company behind the B\u00fc 131 Jungmann<\/span><\/summary>\n<div class=\"a\">\n<p>The Jungmann was the making of a company that would leave a mark on aviation far larger than its size. <strong>Carl Clemens B\u00fccker<\/strong> was a First World War German naval aviator who, when post-war restrictions gutted German aircraft manufacturing, moved to Sweden and built up the firm <strong>Svenska Aero<\/strong>. There he honed both his engineering instincts and his eye for talent \u2014 hiring the young Swedish designer <strong>Anders J. Andersson<\/strong>. When B\u00fccker returned to Germany and founded <strong>B\u00fccker Flugzeugbau<\/strong> in 1932, Andersson came too, and became the creative force behind the company\u2019s aircraft. In just a few years the pair produced the B\u00fc&nbsp;131 Jungmann, the B\u00fc&nbsp;133 Jungmeister and the B\u00fc&nbsp;181 Bestmann \u2014 a trio of trainers admired for exactly the same quality: light, honest, beautifully harmonised handling. Andersson later returned to work in Sweden, but the design philosophy he brought to Rangsdorf is why a Jungmann still feels so alive in the hands today.<\/p>\n<\/div>\n<\/details>\n<details class=\"deep\">\n<summary><span class=\"no\">09<\/span><span class=\"t\">B\u00fc 131A vs B\u00fc 131B: the Jungmann variants and the wider B\u00fccker family<\/span><\/summary>\n<div class=\"a\">\n<p>The two principal German versions differ mainly in power. The original <strong>B\u00fc&nbsp;131A<\/strong> used the Hirth HM&nbsp;60R of about 80&nbsp;hp; the definitive <strong>B\u00fc&nbsp;131B<\/strong> fitted the larger HM&nbsp;504 of roughly 105&nbsp;hp, giving livelier climb and crisper aerobatics, and it was the B that was built and copied in the greatest numbers. Beyond Germany, the licence machines form a family of their own: the Spanish <strong>CASA 1.131<\/strong> (often re-engined and produced into the 1960s), the Japanese <strong>Ki-86<\/strong> and <strong>K9W Momiji<\/strong>, the Czechoslovak <strong>Aero C-4 \/ C-104<\/strong> and <strong>Tatra T-131<\/strong>, and the Swiss <strong>Doflug\/Dornier<\/strong>-built aircraft. It is easy to confuse the Jungmann with its stablemates, so it is worth being precise: the single-seat <strong>B\u00fc&nbsp;133 Jungmeister<\/strong> is the aerobatic champion derived from it, while the <strong>B\u00fc&nbsp;181 Bestmann<\/strong> is a later low-wing monoplane trainer \u2014 a different aircraft entirely. The Jungmann proper is always the two-seat biplane.<\/p>\n<\/div>\n<\/details>\n<\/div>\n<\/div>\n<\/section>\n<hr class=\"divider\">\n<section>\n<div class=\"wrap\">\n<div class=\"kicker\">Technical Data<\/div>\n<h2>B\u00fccker B\u00fc 131 Jungmann full specifications<\/h2>\n<div class=\"specgrid\">\n<div class=\"spectable\">\n<h4>Airframe &amp; Performance (B\u00fc 131B)<\/h4>\n<dl>\n<dt>Crew<\/dt>\n<dd>2 (student &amp; instructor, tandem)<\/dd>\n<dt>Length<\/dt>\n<dd>6.62 m<\/dd>\n<dt>Wingspan<\/dt>\n<dd>7.40 m<\/dd>\n<dt>Height<\/dt>\n<dd>2.25 m<\/dd>\n<dt>Wing area<\/dt>\n<dd>~13.5 m\u00b2<\/dd>\n<dt>Configuration<\/dt>\n<dd>Single-bay biplane, fixed tailskid\/wheel gear<\/dd>\n<dt>Empty weight<\/dt>\n<dd>~390 kg<\/dd>\n<dt>Max takeoff weight<\/dt>\n<dd>~680 kg<\/dd>\n<dt>Max speed<\/dt>\n<dd>~183 km\/h<\/dd>\n<dt>Cruise speed<\/dt>\n<dd>~170 km\/h<\/dd>\n<dt>Stall speed<\/dt>\n<dd>~60 km\/h<\/dd>\n<dt>Rate of climb<\/dt>\n<dd>~4 m\/s<\/dd>\n<dt>Range<\/dt>\n<dd>~650 km<\/dd>\n<dt>Endurance<\/dt>\n<dd>~3.5 hours<\/dd>\n<dt>Service ceiling<\/dt>\n<dd>~3,000\u20134,000 m<\/dd>\n<\/dl>\n<\/div>\n<div class=\"spectable\">\n<h4>Powerplant, Programme &amp; Cost<\/h4>\n<dl>\n<dt>Engine (B\u00fc 131A)<\/dt>\n<dd>Hirth HM 60R \u00b7 ~80 hp<\/dd>\n<dt>Engine (B\u00fc 131B)<\/dt>\n<dd>Hirth HM 504 \u00b7 ~105 hp<\/dd>\n<dt>Configuration<\/dt>\n<dd>Inverted air-cooled inline-4<\/dd>\n<dt>Propeller<\/dt>\n<dd>Two-blade fixed-pitch wooden<\/dd>\n<dt>Manufacturer<\/dt>\n<dd>B\u00fccker Flugzeugbau, Germany<\/dd>\n<dt>Designer<\/dt>\n<dd>Anders J. Andersson<\/dd>\n<dt>First flight<\/dt>\n<dd>27 April 1934<\/dd>\n<dt>Built<\/dt>\n<dd>Thousands, incl. all licences (estimate)<\/dd>\n<dt>Licence variants<\/dt>\n<dd>CASA 1.131, Ki-86, K9W, Aero C-104, Tatra T-131<\/dd>\n<dt>Swiss builder<\/dt>\n<dd>Doflug \/ Dornier, Altenrhein<\/dd>\n<dt>Unit cost<\/dt>\n<dd>No open-market price (1930s military\/club type)<\/dd>\n<dt>Cost per flight hour<\/dt>\n<dd>No standard figure for a vintage type<\/dd>\n<\/dl>\n<\/div>\n<\/div>\n<div class=\"deepset\">\n<details class=\"deep\">\n<summary><span class=\"no\">10<\/span><span class=\"t\">The B\u00fccker B\u00fc 131 Jungmann\u2019s operating costs: what a vintage biplane actually costs to fly<\/span><\/summary>\n<div class=\"a\">\n<p>There is no meaningful \u201cunit price\u201d or official <strong>cost-per-flight-hour<\/strong> for a B\u00fc&nbsp;131. It was a 1930s military and club trainer, never sold on a modern open market, and the survivors are one-off restorations whose value depends entirely on condition, engine and provenance. In practice, running one today is the cost of a small vintage aeroplane: a modest-power engine burning ordinary avgas at a low rate, set against the real expense of maintaining a fabric-and-steel-tube airframe \u2014 recovering fabric, protecting woodwork, and keeping an ageing engine airworthy \u2014 to certified standard. Restored examples change hands for figures typical of desirable vintage biplanes rather than warbird fighters, but any precise number you see should be treated as an estimate. The clearest public price attached to the type is simply the <strong>ticket<\/strong>: MiGFlug\u2019s partner GoAviator offers a passenger flight in a genuine open-cockpit Jungmann from Grenchen for roughly <strong>430\u2013790 CHF<\/strong>, depending on duration and whether you choose sightseeing or aerobatics.<\/p>\n<\/div>\n<\/details>\n<\/div>\n<\/div>\n<\/section>\n<hr class=\"divider\">\n<section>\n<div class=\"wrap\">\n<div class=\"kicker\">Timeline<\/div>\n<h2>B\u00fccker B\u00fc 131 Jungmann: ninety years in the air<\/h2>\n<div class=\"tl\">\n<div class=\"tl-item\">\n<div class=\"yr\">1932<\/div>\n<h3>B\u00fccker comes home<\/h3>\n<p>Carl Clemens B\u00fccker, back from running the Svenska Aero works in Sweden, founds B\u00fccker Flugzeugbau near Berlin and brings Swedish designer Anders Andersson with him.<\/p>\n<\/div>\n<div class=\"tl-item\">\n<div class=\"yr\">1934<\/div>\n<h3>First flight<\/h3>\n<p>The prototype B\u00fc 131 Jungmann flies on 27 April \u2014 a light, fully aerobatic two-seat biplane trainer powered by an inverted Hirth engine.<\/p>\n<\/div>\n<div class=\"tl-item\">\n<div class=\"yr\">1935\u201336<\/div>\n<h3>Luftwaffe standard trainer<\/h3>\n<p>The improved B\u00fc 131B with the 105-hp Hirth HM 504 enters mass service as the primary trainer of the expanding Luftwaffe and Germany\u2019s civil flying schools.<\/p>\n<\/div>\n<div class=\"tl-item\">\n<div class=\"yr\">1935<\/div>\n<h3>The Jungmeister is born<\/h3>\n<p>Andersson shrinks the design into the single-seat B\u00fc 133 Jungmeister, which quickly becomes one of the outstanding aerobatic aircraft of the decade.<\/p>\n<\/div>\n<div class=\"tl-item\">\n<div class=\"yr\">1936<\/div>\n<h3>Switzerland builds its own<\/h3>\n<p>Licence assembly begins at Dornier\/Doflug in Altenrhein; the Swiss Air Force adopts the Jungmann as its primary trainer, with \u201cA-\u201d military registrations.<\/p>\n<\/div>\n<div class=\"tl-item\">\n<div class=\"yr\">1930s\u201340s<\/div>\n<h3>Exported and copied worldwide<\/h3>\n<p>The type is licence-built in Spain (CASA 1.131), Japan (Ki-86 \/ K9W Momiji), Hungary, Czechoslovakia and Yugoslavia \u2014 thousands are produced across all lines.<\/p>\n<\/div>\n<div class=\"tl-item\">\n<div class=\"yr\">1939\u201345<\/div>\n<h3>Wartime service<\/h3>\n<p>The Jungmann remains overwhelmingly a primary trainer, with individual aircraft used for liaison, glider-towing and light observation. GoAviator\u2019s A-66 is built at Altenrhein in 1939.<\/p>\n<\/div>\n<div class=\"tl-item\">\n<div class=\"yr\">1950s\u201360s<\/div>\n<h3>Spain keeps the line alive<\/h3>\n<p>CASA continues building the Jungmann as the CASA 1.131 into the 1960s, many re-engined \u2014 the reason so many survivors today are Spanish-built airframes.<\/p>\n<\/div>\n<div class=\"tl-item\">\n<div class=\"yr\">1971<\/div>\n<h3>End of Swiss service<\/h3>\n<p>Switzerland retires its military Jungmanns after 35 years of continuous use; many pass directly into private and warbird ownership.<\/p>\n<\/div>\n<div class=\"tl-item\">\n<div class=\"yr\">Today<\/div>\n<h3>Still flying \u2014 and bookable<\/h3>\n<p>Hundreds remain airworthy worldwide as beloved vintage aerobatic biplanes. MiGFlug\u2019s partner GoAviator offers open-cockpit Jungmann flights from Grenchen, Switzerland.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<hr class=\"divider\">\n<section>\n<div class=\"wrap\">\n<div class=\"kicker\">Stories &amp; Eyewitnesses<\/div>\n<h2>From the cockpit: twelve Jungmann stories<\/h2>\n<div class=\"car\"><button class=\"cbtn p\" onclick=\"document.getElementById('stcar').scrollBy({left:-712,behavior:'smooth'})\">\u2039<\/button><button class=\"cbtn n\" onclick=\"document.getElementById('stcar').scrollBy({left:712,behavior:'smooth'})\">\u203a<\/button><\/p>\n<div class=\"track\" id=\"stcar\">\n<div class=\"mscard\">\n<div class=\"tag\">Origins<\/div>\n<h4>From Sweden, with a Swede<\/h4>\n<p>Carl B\u00fccker learned aircraft-building in Sweden and brought designer Anders Andersson home with him.<\/p>\n<details>\n<summary>Read the full story<\/summary>\n<div class=\"full\">After the First World War, the Treaty of Versailles crippled German aviation, so the former German naval aviator Carl Clemens B\u00fccker went abroad to keep working. In Sweden he built up the aircraft manufacturer Svenska Aero, producing military machines and learning how to run an aircraft business. When the political climate changed and he returned to Germany in 1932 to found B\u00fccker Flugzeugbau, he brought his gifted Swedish chief designer, Anders J. Andersson, with him. Andersson would design the Jungmann, the Jungmeister and the Bestmann \u2014 and it is his feel for light, perfectly harmonised controls that pilots still rave about in the Jungmann today. The company was, in a real sense, a German firm built on Swedish experience.<\/div>\n<\/details>\n<\/div>\n<div class=\"mscard\">\n<div class=\"tag\">1934<\/div>\n<h4>The prototype takes off<\/h4>\n<p>The first Jungmann flew on 27 April 1934 and impressed everyone who touched the controls.<\/p>\n<details>\n<summary>Read the full story<\/summary>\n<div class=\"full\">The B\u00fc 131 was designed quickly and built light: a welded steel-tube fuselage, wooden wings, doped fabric and a small inverted Hirth engine of about 80&nbsp;hp. From its first flight on 27 April 1934 it was obvious that B\u00fccker had something special \u2014 an aeroplane docile enough for a nervous first solo, yet crisp and honest enough to teach loops, rolls and spins without frightening anyone. Within two years the improved B\u00fc 131B had become the backbone of German primary flight training, and the design was already attracting attention from air forces and flying clubs far beyond Germany\u2019s borders.<\/div>\n<\/details>\n<\/div>\n<div class=\"mscard\">\n<div class=\"tag\">The name<\/div>\n<h4>\u201cYoung man\u201d and \u201cyoung master\u201d<\/h4>\n<p>Jungmann means \u201cyoung man\u201d; the single-seat Jungmeister is the \u201cyoung master.\u201d<\/p>\n<details>\n<summary>Read the full story<\/summary>\n<div class=\"full\">B\u00fccker gave his trainers deliberately paired names that tell you exactly how they relate. The two-seat B\u00fc 131 is the <em>Jungmann<\/em> \u2014 \u201cyoung man,\u201d the beginner who is still learning. Its hotter, single-seat sibling, the B\u00fc 133, is the <em>Jungmeister<\/em> \u2014 the \u201cyoung master\u201d who has graduated. The idea was a natural training ladder: learn the fundamentals and basic aerobatics on the forgiving two-seat Jungmann, then step up to the sharper single-seat Jungmeister. The naming also explains a common modern mix-up \u2014 because only the two-seat Jungmann can carry a passenger, any \u201cfly in a B\u00fccker\u201d ride has to be a B\u00fc 131.<\/div>\n<\/details>\n<\/div>\n<div class=\"mscard\">\n<div class=\"tag\">Luftwaffe<\/div>\n<h4>Where German pilots began<\/h4>\n<p>Through the late 1930s the Jungmann was the first aircraft most German pilots ever flew.<\/p>\n<details>\n<summary>Read the full story<\/summary>\n<div class=\"full\">As Germany rapidly expanded its air arm in the mid-1930s, the Jungmann became the standard ab-initio trainer at flying schools and at the civil <em>Deutsche Verkehrsfliegerschule<\/em> across the country. Enormous numbers of pilots \u2014 many who would go on to fly far more famous machines \u2014 took their very first lessons, first solos and first spins in a B\u00fc 131. As a documentary type it wore the plain training colours and markings of the period; this page follows a neutral, historical approach to those markings rather than sanitising or glamorising them. The Jungmann\u2019s job was simply to turn beginners into aviators, and it did so on a massive scale.<\/div>\n<\/details>\n<\/div>\n<div class=\"mscard\">\n<div class=\"tag\">Spain<\/div>\n<h4>The Jungmann that never stopped<\/h4>\n<p>Spain built the type as the CASA 1.131 into the 1960s \u2014 so most survivors are Spanish.<\/p>\n<details>\n<summary>Read the full story<\/summary>\n<div class=\"full\">No country adopted the Jungmann more thoroughly than Spain. CASA built it under licence as the CASA 1.131 in very large numbers, keeping the production line open into the 1960s \u2014 decades after German production had ended. Many Spanish machines were re-engined with the home-built ENMA Tigre or, later, with American Continental flat-fours, giving them a different sound and feel from the original Hirth-powered aircraft. Because Spanish output was so large and continued so late, a great share of the airworthy \u201cB\u00fccker Jungmanns\u201d flying anywhere in the world today are in fact Spanish-built CASA 1.131s wearing B\u00fccker\u2019s name.<\/div>\n<\/details>\n<\/div>\n<div class=\"mscard\">\n<div class=\"tag\">Japan<\/div>\n<h4>A B\u00fccker in the Far East<\/h4>\n<p>Japan licence-built the Jungmann as the Army Ki-86 and the Navy K9W Momiji.<\/p>\n<details>\n<summary>Read the full story<\/summary>\n<div class=\"full\">The Jungmann\u2019s reach extended all the way to Japan, which built it under licence for both of its armed services. The Imperial Japanese Army flew it as the Kokusai Ki-86, while the Navy operated it as the Kyushu K9W Momiji \u2014 \u201cmaple leaf.\u201d Producing a German trainer on the other side of the world, in two separate service versions, is a small but telling illustration of just how completely B\u00fccker\u2019s little biplane had conquered the world\u2019s flying schools in the years before and during the Second World War. Few training aircraft of any nation were ever adopted quite so widely.<\/div>\n<\/details>\n<\/div>\n<div class=\"mscard\">\n<div class=\"tag\">Switzerland<\/div>\n<h4>Thirty-five years of Swiss service<\/h4>\n<p>The Swiss Air Force flew Doflug-built Jungmanns from 1936 until 1971.<\/p>\n<details>\n<summary>Read the full story<\/summary>\n<div class=\"full\">Switzerland assembled the Jungmann under licence at Dornier\/Doflug in Altenrhein and operated it as a military primary trainer from 1936 all the way to 1971 \u2014 a remarkable 35-year front-line training career. Swiss military machines carried \u201cA-\u201d registrations, and when they were finally retired many passed straight into private and warbird ownership, which is why Switzerland remains a stronghold of flying Jungmanns to this day. GoAviator\u2019s bookable biplane at Grenchen is one of these aircraft: a Doflug-built B\u00fc 131 completed in 1939, originally delivered to the Swiss Air Force as A-66 (works number 79).<\/div>\n<\/details>\n<\/div>\n<div class=\"mscard\">\n<div class=\"tag\">Jungmeister<\/div>\n<h4>The champion sibling<\/h4>\n<p>The single-seat B\u00fc 133 Jungmeister became a 1930s world-aerobatic star.<\/p>\n<details>\n<summary>Read the full story<\/summary>\n<div class=\"full\">Shrink the Jungmann to a single seat, tidy the aerodynamics and add power, and you get the B\u00fc 133 Jungmeister \u2014 one of the outstanding aerobatic aircraft of the 1930s, flown to victory in international competition and still revered by display pilots today. Its fame reflected directly back onto the whole B\u00fccker family and helped make the Jungmann a coveted machine in its own right. But it is worth repeating the key difference: the Jungmeister is a single-seater. It is the two-seat Jungmann, not the single-seat Jungmeister, that can take a passenger into the air \u2014 which is exactly why the flyable experience uses a B\u00fc 131.<\/div>\n<\/details>\n<\/div>\n<div class=\"mscard\">\n<div class=\"tag\">Engineering<\/div>\n<h4>Why the engine hangs upside-down<\/h4>\n<p>The inverted inline kept the cylinders low so the student could see over the nose.<\/p>\n<details>\n<summary>Read the full story<\/summary>\n<div class=\"full\">The Jungmann\u2019s Hirth engine is an inverted inline-four \u2014 mounted so the cylinders point downward and the crankshaft sits high. It looks strange to modern eyes, but it is clever design: a high thrust-line and a slim, low nose give the pilot an excellent view forward, which matters enormously when a student is learning to judge a three-point landing in a taildragger. The inverted layout was common on German trainers of the era for exactly this reason. It is also an unstressed, easy-going engine that runs on ordinary fuel, one of several practical touches that have helped keep the type flyable and affordable for the better part of a century.<\/div>\n<\/details>\n<\/div>\n<div class=\"mscard\">\n<div class=\"tag\">Handling<\/div>\n<h4>The biplane pilots fall in love with<\/h4>\n<p>Ask anyone who has flown one: the Jungmann\u2019s controls are close to perfect.<\/p>\n<details>\n<summary>Read the full story<\/summary>\n<div class=\"full\">The Jungmann is routinely described as one of the most delightful aircraft ever built. The controls are light and beautifully harmonised, the aircraft communicates through the stick, it gives honest warning before a stall, and it will loop, roll and spin cleanly on very modest power. It is slow \u2014 and in an open cockpit you feel every knot of it \u2014 but that sensory directness is precisely why pilots and passengers love it. There is no glass, no automation, nothing between you and the air: just the slipstream, the note of the engine and the horizon tilting over the top wing. It is flying distilled to its essentials, and it is exactly what a modern passenger meets on the Grenchen flight.<\/div>\n<\/details>\n<\/div>\n<div class=\"mscard\">\n<div class=\"tag\">Today<\/div>\n<h4>You can still fly one<\/h4>\n<p>MiGFlug\u2019s partner GoAviator offers open-cockpit Jungmann flights from Grenchen.<\/p>\n<details>\n<summary>Read the full story<\/summary>\n<div class=\"full\">Unlike almost every aircraft in this encyclopedia, the Jungmann is one you can actually experience from the cockpit. GoAviator, a MiGFlug partner brand, flies a genuine 1939 open-cockpit B\u00fccker Jungmann \u2014 the Swiss Doflug-built A-66 \u2014 from Grenchen in Switzerland, with the passenger up front in leather cap and goggles. You choose scenic sightseeing over the Swiss Mittelland and Jura, a full aerobatic sequence of loops, rolls, inverted flight, Immelmanns and spins, or a combination of both, in flights of about 30 or 60 minutes. It is one of the very few ways left to fly in a pre-war biplane exactly as its first students did, and it costs roughly 430\u2013790 CHF.<\/div>\n<\/details>\n<\/div>\n<div class=\"mscard\">\n<div class=\"tag\">Legacy<\/div>\n<h4>Hundreds still airworthy<\/h4>\n<p>Ninety years on, the Jungmann remains a cornerstone of the vintage-aircraft world.<\/p>\n<details>\n<summary>Read the full story<\/summary>\n<div class=\"full\">Most trainers vanish the moment their students move on. The Jungmann did the opposite: its charm turned it into a vintage cult classic, and the sheer number built \u2014 German B\u00fccker machines, Spanish CASA 1.131s, Czech Aero and Tatra aircraft, Swiss Doflug examples \u2014 meant plenty survived to be lovingly restored. Hundreds remain airworthy across Europe, the Americas and Australasia, appearing at airshows, fly-ins and aerobatic contests. Few aircraft of any era have been so widely built, so widely copied, and so deeply loved for so long \u2014 and fewer still can be booked for a flight ninety years after the prototype first left the ground.<\/div>\n<\/details>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<hr class=\"divider\">\n<section>\n<div class=\"wrap\">\n<div class=\"kicker\">Gallery<\/div>\n<h2>The B\u00fccker Jungmann in pictures<\/h2>\n<div class=\"car\"><button class=\"cbtn p\" onclick=\"document.getElementById('gal').scrollBy({left:-660,behavior:'smooth'})\">\u2039<\/button><button class=\"cbtn n\" onclick=\"document.getElementById('gal').scrollBy({left:660,behavior:'smooth'})\">\u203a<\/button><\/p>\n<div class=\"track gal\" id=\"gal\">\n<figure data-full=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:78--.b845\/w:1024\/h:768\/q:96\/f:best\/https:\/\/migflug.com\/wp-content\/uploads\/2026\/08\/bucker-bu-131-jungmann-in-flight.jpg\"><img data-opt-id=43818205  data-opt-src=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:78--.b845\/w:980\/h:735\/q:96\/f:best\/https:\/\/migflug.com\/wp-content\/uploads\/2026\/08\/bucker-bu-131-jungmann-in-flight.jpg\"  class=\"ph\" src=\"data:image/svg+xml,%3Csvg%20viewBox%3D%220%200%20980%20735%22%20width%3D%22980%22%20height%3D%22735%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Crect%20width%3D%22980%22%20height%3D%22735%22%20fill%3D%22transparent%22%2F%3E%3C%2Fsvg%3E\" alt=\"A restored B\u00fccker B\u00fc 131 Jungmann in flight  light, slow and beautifully balanced.\" loading=\"lazy\" decoding=\"async\"><figcaption>A restored B\u00fccker B\u00fc 131 Jungmann in flight \u2014 light, slow and beautifully balanced.<span>Photo: Alex Layzell \u00b7 CC BY-SA 2.0<\/span><\/figcaption><\/figure>\n<figure data-full=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:78--.b845\/w:1280\/h:705\/q:96\/f:best\/https:\/\/migflug.com\/wp-content\/uploads\/2026\/08\/bucker-bu-131-jungmann-period-markings.jpg\"><img data-opt-id=1827035609  data-opt-src=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:78--.b845\/w:980\/h:540\/q:96\/f:best\/https:\/\/migflug.com\/wp-content\/uploads\/2026\/08\/bucker-bu-131-jungmann-period-markings.jpg\"  class=\"ph\" src=\"data:image/svg+xml,%3Csvg%20viewBox%3D%220%200%20980%20540%22%20width%3D%22980%22%20height%3D%22540%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Crect%20width%3D%22980%22%20height%3D%22540%22%20fill%3D%22transparent%22%2F%3E%3C%2Fsvg%3E\" alt=\"A Jungmann warbird in authentic 1930s German trainer markings.\" loading=\"lazy\" decoding=\"async\"><figcaption>A Jungmann warbird in authentic 1930s German trainer markings.<span>Photo: Tony Hisgett \u00b7 CC BY 2.0<\/span><\/figcaption><\/figure>\n<figure data-full=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:78--.b845\/w:1280\/h:960\/q:96\/f:best\/https:\/\/migflug.com\/wp-content\/uploads\/2026\/08\/bucker-bu-131-jungmann-formation.jpg\"><img data-opt-id=590322886  data-opt-src=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:78--.b845\/w:980\/h:735\/q:96\/f:best\/https:\/\/migflug.com\/wp-content\/uploads\/2026\/08\/bucker-bu-131-jungmann-formation.jpg\"  class=\"ph\" src=\"data:image/svg+xml,%3Csvg%20viewBox%3D%220%200%20980%20735%22%20width%3D%22980%22%20height%3D%22735%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Crect%20width%3D%22980%22%20height%3D%22735%22%20fill%3D%22transparent%22%2F%3E%3C%2Fsvg%3E\" alt=\"Jungmanns in formation  gentle aerobatic manners made the type a display favourite.\" loading=\"lazy\" decoding=\"async\"><figcaption>Jungmanns in formation \u2014 gentle aerobatic manners made the type a display favourite.<span>Photo: Hornet Driver \u00b7 CC BY-SA 3.0<\/span><\/figcaption><\/figure>\n<figure data-full=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:78--.b845\/w:1280\/h:960\/q:96\/f:best\/https:\/\/migflug.com\/wp-content\/uploads\/2026\/08\/bucker-bu-131-jungmann-cockpit.jpg\"><img data-opt-id=1433010898  data-opt-src=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:78--.b845\/w:980\/h:735\/q:96\/f:best\/https:\/\/migflug.com\/wp-content\/uploads\/2026\/08\/bucker-bu-131-jungmann-cockpit.jpg\"  class=\"ph\" src=\"data:image/svg+xml,%3Csvg%20viewBox%3D%220%200%20980%20735%22%20width%3D%22980%22%20height%3D%22735%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Crect%20width%3D%22980%22%20height%3D%22735%22%20fill%3D%22transparent%22%2F%3E%3C%2Fsvg%3E\" alt=\"The open tandem cockpit and simple panel of a B\u00fccker Jungmann.\" loading=\"lazy\" decoding=\"async\"><figcaption>The open tandem cockpit and simple panel of a B\u00fccker Jungmann.<span>Photo: Alexandre Pr\u00e9vot \u00b7 CC BY-SA 2.0<\/span><\/figcaption><\/figure>\n<figure data-full=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:78--.b845\/w:1280\/h:735\/q:96\/f:best\/https:\/\/migflug.com\/wp-content\/uploads\/2026\/08\/bucker-bu-131-jungmann-casa-spain.jpg\"><img data-opt-id=2068880551  data-opt-src=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:78--.b845\/w:980\/h:562\/q:96\/f:best\/https:\/\/migflug.com\/wp-content\/uploads\/2026\/08\/bucker-bu-131-jungmann-casa-spain.jpg\"  class=\"ph\" src=\"data:image/svg+xml,%3Csvg%20viewBox%3D%220%200%20980%20562%22%20width%3D%22980%22%20height%3D%22562%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Crect%20width%3D%22980%22%20height%3D%22562%22%20fill%3D%22transparent%22%2F%3E%3C%2Fsvg%3E\" alt=\"A Spanish-registered Jungmann; Spain built the type under licence as the CASA 1.131.\" loading=\"lazy\" decoding=\"async\"><figcaption>A Spanish-registered Jungmann; Spain built the type under licence as the CASA 1.131.<span>Photo: CarlosVdeHabsburgo \u00b7 CC BY-SA 4.0<\/span><\/figcaption><\/figure>\n<figure data-full=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:78--.b845\/w:1280\/h:756\/q:96\/f:best\/https:\/\/migflug.com\/wp-content\/uploads\/2026\/08\/bucker-bu-131a-jungmann-1935.jpg\"><img data-opt-id=1387502886  data-opt-src=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:78--.b845\/w:980\/h:579\/q:96\/f:best\/https:\/\/migflug.com\/wp-content\/uploads\/2026\/08\/bucker-bu-131a-jungmann-1935.jpg\"  class=\"ph\" src=\"data:image/svg+xml,%3Csvg%20viewBox%3D%220%200%20980%20579%22%20width%3D%22980%22%20height%3D%22579%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Crect%20width%3D%22980%22%20height%3D%22579%22%20fill%3D%22transparent%22%2F%3E%3C%2Fsvg%3E\" alt=\"An early B\u00fccker B\u00fc 131A (D-EXIR), photographed around 1935.\" loading=\"lazy\" decoding=\"async\"><figcaption>An early B\u00fccker B\u00fc 131A (D-EXIR), photographed around 1935.<span>Photo: Unknown author \u00b7 Public domain<\/span><\/figcaption><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<hr class=\"divider\">\n<section>\n<div class=\"wrap\">\n<div class=\"kicker\">Watch<\/div>\n<h2>The B\u00fccker Jungmann in motion<\/h2>\n<div class=\"vidwrap\"><iframe src=\"https:\/\/www.youtube.com\/embed\/xfRY4W2UwNM\" title=\"Flying with the B\u00fccker 131 Jungmann \u2014 Pre-WW2 Trainer\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen=\"\" loading=\"lazy\"><\/iframe><\/div>\n<p><em>Flying with the B\u00fccker 131 \u201cJungmann\u201d \u2014 Pre-WW2 Trainer<\/em> (channel: phil style). A pilot\u2019s-eye flight in a restored open-cockpit Jungmann \u2014 the same slow, sensory experience GoAviator offers passengers from Grenchen.<\/p>\n<\/div>\n<\/section>\n<hr class=\"divider\">\n<section>\n<div class=\"wrap\">\n<div class=\"kicker\">Operations<\/div>\n<h2>Where the B\u00fccker Jungmann flew<\/h2>\n<div id=\"sr71-map-widget\" style=\"font-family:'Gilroy semiBold','Gilroy regular',Helvetica,Arial,Lucida,sans-serif;max-width:1080px;width:100%;\">\n<div id=\"sr71-map-container\" style=\"width:100%;position:relative\"><svg id=\"sr71-map-svg\" style=\"width:100%;height:auto;display:block\"><\/svg><\/p>\n<div id=\"sr71-tooltip\" style=\"position:fixed;background:#1a1a2e;color:#fff;padding:10px 16px;border-radius:0;font-size:13px;font-weight:400;letter-spacing:.3px;pointer-events:auto;opacity:0;transition:opacity .15s;z-index:1000;max-width:360px;line-height:1.5\"><\/div>\n<\/div>\n<div id=\"sr71-controls\" 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\"><\/div>\n<p><script>(function(){var el=document.getElementById(\"sr71-data\");var js=decodeURIComponent(escape(atob(el.getAttribute(\"data-js\"))));var sc=document.createElement(\"script\");sc.text=js;document.body.appendChild(sc);})();<\/script><\/div>\n<\/section>\n<hr class=\"divider\">\n<section>\n<div class=\"wrap\">\n<div class=\"kicker\">Record &amp; Legacy<\/div>\n<h2>A trainer\u2019s record: counted in pilots, not kills<\/h2>\n<p>The Jungmann was never a warplane, so it has no tally of air-to-air victories to define it. Its record is written instead in the one thing a trainer actually exists to produce: <strong>pilots<\/strong>. For the better part of four decades it turned nervous beginners into aviators, first across Germany and then, through its many licence versions, across a dozen air forces from Spain to Japan to Switzerland. Measured by how many people first learned to fly on it, few aircraft in history have a stronger claim to importance.<\/p>\n<p>Its second, quieter record is one of <strong>endurance<\/strong>. Where most trainers are scrapped the moment a newer type arrives, the Jungmann kept going \u2014 in Spanish CASA production into the 1960s, in Swiss military service until 1971, and then in private and warbird hands ever since. Ninety years after the prototype first flew, hundreds are still airworthy and still doing loops and rolls at airshows and fly-ins around the world. That combination of huge original numbers and genuine affection is exactly why so many survived.<\/p>\n<p>As a documentary type it wore the plain training markings of its era, including wartime German schemes on 1930s and 1940s airframes; this page treats those markings neutrally and historically rather than sanitising or dramatising them. The Jungmann\u2019s legacy is not conquest but continuity \u2014 a link, unbroken, back to the very beginnings of powered flight training.<\/p>\n<div class=\"combat\">\n<div class=\"cstat zero\"><b>Thousands<\/b><span>Pilots trained \u2014 the Luftwaffe\u2019s standard primary trainer and a dozen other air forces besides<\/span><\/div>\n<div class=\"cstat\"><b>35 years<\/b><span>Continuous Swiss Air Force service, 1936\u20131971<\/span><\/div>\n<div class=\"cstat\"><b>Hundreds<\/b><span>Still airworthy worldwide, nearly a century after first flight<\/span><\/div>\n<\/div>\n<p>Explore more trainers, biplanes and warbirds in the <a href=\"https:\/\/migflug.com\/aircraft\/\">MiGFlug Aircraft Museum<\/a>.<\/p>\n<\/div>\n<\/section>\n<hr class=\"divider\">\n<section id=\"faq\">\n<div class=\"wrap\">\n<div class=\"kicker\">Questions &amp; Answers<\/div>\n<h2>Everything people ask about the B\u00fccker B\u00fc 131 Jungmann<\/h2>\n<div class=\"qa\">\n<details open=\"\">\n<summary>Can I fly in a B\u00fccker B\u00fc 131 Jungmann?<\/summary>\n<div class=\"a\"><b>Yes.<\/b> You can fly in a genuine open-cockpit B\u00fccker Jungmann biplane from Grenchen, Switzerland with MiGFlug\u2019s partner <b>GoAviator<\/b> \u2014 a vintage-biplane sightseeing and aerobatic experience. Because the Jungmann is the two-seat B\u00fc 131, you ride up front in the open cockpit while the pilot flies from behind. You choose scenic sightseeing, aerobatics (loops, rolls, inverted flight) or a mix. <a href=\"https:\/\/www.goaviator.com\/en\/flight\/flight-in-an-open-cockpit-buecker-biplane-grenchen\" target=\"_blank\" rel=\"noopener\">Book the Grenchen B\u00fccker Jungmann flight<\/a>. Flights run roughly 430\u2013790 CHF depending on duration.<\/div>\n<\/details>\n<details>\n<summary>What is the difference between the B\u00fc 131 Jungmann and the B\u00fc 133 Jungmeister?<\/summary>\n<div class=\"a\">The <b>B\u00fc 131 Jungmann<\/b> (\u201cyoung man\u201d) is the two-seat primary trainer; the <b>B\u00fc 133 Jungmeister<\/b> (\u201cyoung master\u201d) is a smaller, more powerful single-seat aerobatic development. They look very similar, which causes endless confusion \u2014 but only the two-seat Jungmann can carry a passenger, which is why every \u201cfly in a B\u00fccker biplane\u201d experience uses a B\u00fc 131. A single-seat Jungmeister physically cannot take anyone along.<\/div>\n<\/details>\n<details>\n<summary>When did the B\u00fccker Jungmann first fly, and who designed it?<\/summary>\n<div class=\"a\">The prototype B\u00fc 131 first flew on <b>27 April 1934<\/b>. It was designed by the Swedish engineer <b>Anders J. Andersson<\/b> for Carl B\u00fccker\u2019s new company, B\u00fccker Flugzeugbau, near Berlin. B\u00fccker had learned the aircraft business running Svenska Aero in Sweden and brought Andersson back to Germany with him; together they also created the B\u00fc 133 Jungmeister and the B\u00fc 181 Bestmann.<\/div>\n<\/details>\n<details>\n<summary>How many B\u00fccker Jungmanns were built?<\/summary>\n<div class=\"a\">Thousands, across German production and licence lines in Spain, Japan, Switzerland, Hungary, Czechoslovakia and Yugoslavia. An exact total does not exist in the public record and estimates vary widely, so any single figure should be read as an approximation. Spain alone built the CASA 1.131 in large numbers into the 1960s, which is why so many survivors are Spanish-built airframes.<\/div>\n<\/details>\n<details>\n<summary>What engine does the B\u00fccker B\u00fc 131 Jungmann use?<\/summary>\n<div class=\"a\">A small <b>Hirth inverted air-cooled inline-four<\/b> \u2014 the HM 60R of about 80 hp in the B\u00fc 131A, and the HM 504 of about 105 hp in the definitive B\u00fc 131B. It is mounted inverted so the nose stays slim and the pilot has a clear view forward. Many Spanish CASA 1.131s were later re-engined with the ENMA Tigre or with Continental and Lycoming flat-fours.<\/div>\n<\/details>\n<details>\n<summary>What are the Jungmann\u2019s licence-built versions?<\/summary>\n<div class=\"a\">The Jungmann was one of the most widely licence-built trainers ever. Spain produced it as the <b>CASA 1.131<\/b>; Japan as the Army <b>Kokusai Ki-86<\/b> and Navy <b>Kyushu K9W Momiji<\/b>; Czechoslovakia continued it after the war as the <b>Aero C-4 \/ C-104<\/b> and <b>Tatra T-131<\/b>; and Switzerland assembled it at <b>Dornier\/Doflug, Altenrhein<\/b>. Hungary and Yugoslavia built or operated it too.<\/div>\n<\/details>\n<details>\n<summary>Which exact aircraft does GoAviator fly at Grenchen?<\/summary>\n<div class=\"a\">A genuine two-seat B\u00fc 131 Jungmann built under licence by <b>Doflug (Dornier-Werke) at Altenrhein in 1939<\/b>, works number 79, originally delivered to the Swiss Air Force as <b>A-66<\/b>. The passenger sits in the front cockpit. GoAviator\u2019s listing calls it a \u201cJungmann\u201d but writes the number as \u201cB\u00fc 133,\u201d which is a simple error \u2014 a single-seat Jungmeister could never carry a passenger, so the flyable aircraft is necessarily the two-seat B\u00fc 131.<\/div>\n<\/details>\n<details>\n<summary>Is the B\u00fccker Jungmann still flying today?<\/summary>\n<div class=\"a\">Very much so. Hundreds remain airworthy worldwide \u2014 German-built B\u00fc 131s, Spanish CASA 1.131s and Czech Aero\/Tatra machines \u2014 and it is a much-loved vintage aerobatic type seen at airshows and fly-ins. It is also one of the rare pre-war aircraft you can book a passenger flight in, via GoAviator from Grenchen, Switzerland.<\/div>\n<\/details>\n<details>\n<summary>Was the B\u00fccker Jungmann ever used in combat?<\/summary>\n<div class=\"a\">Not as a fighting aircraft. It was a primary trainer; during the Second World War some examples were pressed into secondary liaison, communications, glider-towing and light observation duties, but the Jungmann\u2019s place in history is as the aeroplane that taught pilots to fly, not as a combat type.<\/div>\n<\/details>\n<details>\n<summary>Where can I see a B\u00fccker Jungmann?<\/summary>\n<div class=\"a\">Jungmanns and their licence-built cousins appear regularly at vintage airshows, fly-ins and aerobatic contests across Europe, the Americas and Australasia, and preserved examples are held in aviation museums and private collections. Because so many survive \u2014 particularly Spanish CASA 1.131s \u2014 they are among the more commonly seen pre-war biplanes on the display circuit. Switzerland, home of the Doflug-built machines, remains an especially good place to see them flying.<\/div>\n<\/details>\n<details>\n<summary>Is the B\u00fccker Jungmann difficult to fly?<\/summary>\n<div class=\"a\">By the standards of vintage taildraggers it is considered honest and forgiving, which is exactly why it was chosen as a primary trainer \u2014 but it still demands proper stick-and-rudder skill, careful handling on the ground and respect in a crosswind, as any tailwheel biplane does. That is why passenger flights are flown by experienced display pilots: you get the full open-cockpit experience, including aerobatics if you want them, without needing any flying qualification yourself.<\/div>\n<\/details>\n<details>\n<summary>What does an open-cockpit B\u00fccker Jungmann flight include?<\/summary>\n<div class=\"a\">On the Grenchen experience you sit in the front cockpit of a genuine 1939 Swiss-built Jungmann, kitted out with a leather flying cap and goggles, while an experienced display pilot flies from the rear seat. You can choose gentle scenic sightseeing over the Swiss Mittelland and Jura, a full aerobatic sequence \u2014 loops, rolls, inverted flight, Immelmann turns and spins \u2014 or a mix of both, in flights of roughly 30 or 60 minutes. No flying experience is required.<\/div>\n<\/details>\n<details>\n<summary>Why is the B\u00fccker Jungmann so popular with warbird pilots?<\/summary>\n<div class=\"a\">Three reasons: it flies beautifully, it is fully aerobatic, and it survives in real numbers. Pilots consistently rate its light, harmonised controls among the best of any biplane, it will loop and roll cleanly on modest power, and the huge licence production \u2014 especially the Spanish CASA 1.131 \u2014 means airframes and knowledge are still available. Add the romance of an open cockpit and a pre-war pedigree, and it is easy to see why it is a favourite of the vintage scene.<\/div>\n<\/details>\n<\/div>\n<\/div>\n<\/section>\n<section>\n<div class=\"ad\">\n<div class=\"adin\">\n<div class=\"kicker\">Fly it yourself<\/div>\n<h2>You CAN fly the B\u00fccker Jungmann<\/h2>\n<p class=\"adp\">Almost every aircraft in this encyclopedia is one you can only read about. The Jungmann is different. MiGFlug\u2019s partner <b>GoAviator<\/b> flies a genuine 1939 open-cockpit B\u00fccker Jungmann from Grenchen, Switzerland \u2014 you sit up front in leather cap and goggles and choose sightseeing, aerobatics, or both. Roughly 430\u2013790 CHF depending on duration.<\/p>\n<p><a class=\"btn\" href=\"https:\/\/www.goaviator.com\/en\/flight\/flight-in-an-open-cockpit-buecker-biplane-grenchen\" target=\"_blank\" rel=\"noopener\">Book the Grenchen biplane flight<\/a><\/div>\n<\/div>\n<\/section>\n<section style=\"padding-top:44px\">\n<div class=\"wrap\">\n<div class=\"kicker\">Related Aircraft<\/div>\n<h2>Continue the tour<\/h2>\n<div class=\"relgrid\"><a class=\"rel\" href=\"https:\/\/migflug.com\/aircraft\/polikarpov-po-2\/\"><span class=\"rk\">The Contemporary<\/span><span class=\"rh\">Polikarpov Po-2<\/span><span class=\"rp\">The Soviet Union\u2019s indestructible biplane trainer and night bomber \u2014 the Jungmann\u2019s great Eastern counterpart.<\/span><span class=\"go\">Read the Po-2 story<\/span><\/a><a class=\"rel\" href=\"https:\/\/migflug.com\/aircraft\/fairey-swordfish\/\"><span class=\"rk\">The Biplane<\/span><span class=\"rh\">Fairey Swordfish<\/span><span class=\"rp\">The fabric biplane that crippled the Bismarck \u2014 proof the old configuration still had bite in the age of the monoplane.<\/span><span class=\"go\">Read the Swordfish story<\/span><\/a><a class=\"rel\" href=\"https:\/\/migflug.com\/aircraft\/t-34-mentor\/\"><span class=\"rk\">The Successor<\/span><span class=\"rh\">Beechcraft T-34 Mentor<\/span><span class=\"rp\">The piston primary trainer that carried the Jungmann\u2019s teaching mission into the jet age.<\/span><span class=\"go\">Read the T-34 story<\/span><\/a><\/div>\n<\/div>\n<\/section>\n<hr class=\"divider\">\n<section style=\"padding:48px 0 64px\">\n<div class=\"wrap\">\n<div class=\"kicker\">Sources &amp; Further Reading<\/div>\n<h2>Every fact, checked<\/h2>\n<ul class=\"srclist\">\n<li><a href=\"https:\/\/airandspace.si.edu\/\" target=\"_blank\" rel=\"noopener\">Smithsonian National Air and Space Museum<\/a><span>Reference for the B\u00fccker family of trainers and the B\u00fc 133 Jungmeister aerobatic derivative held in the national collection.<\/span><\/li>\n<li><a href=\"https:\/\/www.historyofwar.org\/articles\/weapons_bucker_bu_131_jungmann.html\" target=\"_blank\" rel=\"noopener\">History of War \u2014 B\u00fccker B\u00fc 131 Jungmann<\/a><span>Development history, the A and B variants, licence production and wartime service background.<\/span><\/li>\n<li><a href=\"https:\/\/www.flugzeuginfo.net\/acdata_php\/acdata_bu131_en.php\" target=\"_blank\" rel=\"noopener\">flugzeuginfo.net \u2014 B\u00fc 131 technical data<\/a><span>Dimensions, weights, engine and performance figures used for the B\u00fc 131B specification table.<\/span><\/li>\n<li><a href=\"http:\/\/swissair00.ch\/a_Index\/buecker-bue-131--jungmann.html\" target=\"_blank\" rel=\"noopener\">Aviation History of Switzerland<\/a><span>Swiss Doflug\/Dornier licence production at Altenrhein and Swiss Air Force service from 1936 to 1971, including the \u201cA-\u201d registrations.<\/span><\/li>\n<li><a href=\"https:\/\/theaviationgeekclub.com\/\" target=\"_blank\" rel=\"noopener\">The Aviation Geek Club<\/a><span>Vintage-warbird coverage of the Jungmann, its handling reputation and its many licence variants.<\/span><\/li>\n<li><a href=\"https:\/\/www.warbirdalley.com\/\" target=\"_blank\" rel=\"noopener\">Warbird Alley<\/a><span>Background on surviving B\u00fccker Jungmann and CASA 1.131 warbirds and their place in the vintage-aircraft world.<\/span><\/li>\n<li><a href=\"https:\/\/historicandclassicaircraftsales.com\/bucker-bu-131-jungmann\" target=\"_blank\" rel=\"noopener\">Historic &amp; Classic Aircraft Sales<\/a><span>Market notes, restoration detail and history for surviving B\u00fc 131 and CASA 1.131 airframes.<\/span><\/li>\n<li><a href=\"https:\/\/commons.wikimedia.org\/wiki\/Category:B%C3%BCcker_B%C3%BC_131_Jungmann\" target=\"_blank\" rel=\"noopener\">Wikimedia Commons<\/a><span>Image source for the photographs used on this page; each individual credit and licence is shown in the gallery captions above.<\/span><\/li>\n<\/ul>\n<\/div>\n<\/section>\n<div id=\"galfix71\" data-js=\"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\" style=\"display: none;\"><\/div>\n<p><script>(function(){var el=document.getElementById(\"galfix71\");var js=decodeURIComponent(escape(atob(el.getAttribute(\"data-js\"))));var sc=document.createElement(\"script\");sc.text=js;document.body.appendChild(sc);})();<\/script><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Aircraft Museum \u203a Primary Trainer \u203a B\u00fc 131 Jungmann B\u00fccker B\u00fc 131\u201cJungmann\u201d The little open-cockpit biplane that taught the world to fly \u2014 Germany\u2019s classic 1930s primary trainer, licence-built on four continents and still looping over airfields nearly a century later. And this is one of the very few historic types you can still book [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":20516,"parent":15960,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"editor_notices":[],"footnotes":""},"class_list":["post-20523","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>B\u00fccker B\u00fc 131 Jungmann \u2014 History, Specs, Photos &amp; Stories<\/title>\n<meta name=\"description\" content=\"The B\u00fccker B\u00fc 131 Jungmann: history, specs, photos and stories of Germany&#039;s classic 1930s open-cockpit biplane trainer, and how to fly one today.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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