{"id":23273066,"date":"2026-09-18T15:49:33","date_gmt":"2026-09-18T13:49:33","guid":{"rendered":"https:\/\/migflug.com\/afterburner\/bell-xp-77-wooden-lightweight-fighter-1944\/"},"modified":"2026-09-18T15:50:06","modified_gmt":"2026-09-18T13:50:06","slug":"bell-xp-77-wooden-lightweight-fighter-1944","status":"publish","type":"post","link":"https:\/\/migflug.com\/afterburner\/fr\/bell-xp-77-wooden-lightweight-fighter-1944\/","title":{"rendered":"Bell XP-77: America\u2019s Wooden Lightweight Fighter"},"content":{"rendered":"\r\n<style>.et_pb_title_container h1.entry-title { padding-top: 40px !important; }<\/style>\r\n\r\n\r\n<p>In 1941 the US Army Air Forces asked a sensible question. What if aluminium ran short, and what if the enemy could be fought with something small, cheap and made of wood?<\/p>\r\n\r\n<p>Bell answered with the XP-77: a fighter the size of a racing aeroplane, built largely of timber, weighing about as much as a loaded family car. Two were built. One of them killed itself over Florida while attempting an Immelmann.<\/p>\r\n\r\n\r\n<div style=\"background:#f5f6f8;border-left:4px solid #5C91FF;padding:18px 22px;margin:24px 0\"><p style=\"margin:0 0 10px;font-weight:700;font-size:17px;color:#0d1117\">Quick Facts<\/p><table style=\"width:100%;border-collapse:collapse;font-size:15px\"><tr><td style=\"padding:5px 12px 5px 0;color:#555;vertical-align:top;white-space:nowrap\">Aircraft<\/td><td style=\"padding:5px 0;color:#0d1117;vertical-align:top\">Bell XP-77 (company designations Tri-4, later D-6)<\/td><\/tr><tr><td style=\"padding:5px 12px 5px 0;color:#555;vertical-align:top;white-space:nowrap\">Concept<\/td><td style=\"padding:5px 0;color:#0d1117;vertical-align:top\">&ldquo;Very light&rdquo; interceptor of non-strategic materials \u2014 principally wood<\/td><\/tr><tr><td style=\"padding:5px 12px 5px 0;color:#555;vertical-align:top;white-space:nowrap\">Project started<\/td><td style=\"padding:5px 0;color:#0d1117;vertical-align:top\">October 1941<\/td><\/tr><tr><td style=\"padding:5px 12px 5px 0;color:#555;vertical-align:top;white-space:nowrap\">Originally ordered<\/td><td style=\"padding:5px 0;color:#0d1117;vertical-align:top\">25 aircraft, recommended 16 May 1942; cut to two<\/td><\/tr><tr><td style=\"padding:5px 12px 5px 0;color:#555;vertical-align:top;white-space:nowrap\">First flight<\/td><td style=\"padding:5px 0;color:#0d1117;vertical-align:top\">1 April 1944, at Wright Field<\/td><\/tr><tr><td style=\"padding:5px 12px 5px 0;color:#555;vertical-align:top;white-space:nowrap\">Engine<\/td><td style=\"padding:5px 0;color:#0d1117;vertical-align:top\">Ranger V-770-7 inverted V12, 520 hp, unsupercharged<\/td><\/tr><tr><td style=\"padding:5px 12px 5px 0;color:#555;vertical-align:top;white-space:nowrap\">Wingspan<\/td><td style=\"padding:5px 0;color:#0d1117;vertical-align:top\">27 ft 6 in (8.38 m); empty weight 2,855 lb (1,295 kg)<\/td><\/tr><tr><td style=\"padding:5px 12px 5px 0;color:#555;vertical-align:top;white-space:nowrap\">Top speed<\/td><td style=\"padding:5px 0;color:#0d1117;vertical-align:top\">330 mph (530 km\/h)<\/td><\/tr><tr><td style=\"padding:5px 12px 5px 0;color:#555;vertical-align:top;white-space:nowrap\">Fate<\/td><td style=\"padding:5px 0;color:#0d1117;vertical-align:top\">Second prototype destroyed 2 October 1944; programme ended December 1944<\/td><\/tr><\/table><\/div>\r\n<h2 style=\"padding-top:22px\">A fighter modelled on an air racer<\/h2>\r\n\r\n<p>The XP-77 was explicitly conceived in the mould of the 1930s Thompson Trophy racers: tiny, clean, and built around the idea that if you keep the aeroplane small enough you do not need much engine.<\/p>\r\n\r\n<p>It was a low-wing monoplane of mainly wooden construction, with tricycle landing gear \u2014 a Bell signature, shared with the <a href=\"https:\/\/migflug.com\/aircraft\/p-39-airacobra\/\">P-39 Airacobra<\/a> \u2014 and a bubble canopy set well back behind a long nose. The planned armament was a 20 mm Hispano cannon firing through the propeller hub, in the Airacobra manner, plus two .50 calibre Brownings.<\/p>\r\n\r\n<p>On paper it was charming. In the metal, or rather in the plywood, everything went wrong slowly.<\/p>\r\n\r\n\r\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px;width:100%\"><img decoding=\"async\" class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" width=\"1024\" src=\"https:\/\/migflug.com\/afterburner\/wp-content\/uploads\/sites\/4\/2026\/09\/bell-xp-77-on-the-ramp.jpg\" alt=\"Bell XP-77 prototype 43-34915 on the ramp\" style=\"width:100%;height:auto;max-width:100%;display:block\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">Bell XP-77 43-34915. The scale is deceptive in photographs: the wingspan was under 28 feet and the empty weight under 3,000 lb. Photo: Bill Larkins \/ Wikimedia Commons, CC BY-SA 2.0<\/figcaption><\/figure>\r\n<h2 style=\"padding-top:22px\">The engine that never arrived<\/h2>\r\n\r\n<p>The design assumed a supercharged Ranger XV-770-9 of 500 hp. That engine slipped by roughly eighteen months, so the prototypes flew with the unsupercharged XV-770-7 instead. An interceptor without a supercharger is a contradiction in terms: superchargers are what let a fighter keep making power at the altitude where interception happens.<\/p>\r\n\r\n<p>Meanwhile the airframe was gaining weight against a 3,700 lb design limit, and Bell had subcontracted the woodwork because its own shops were full of Airacobras. A change of wing subcontractor turned ugly when the first refused to release parts. Then came doubts about the glue, and whether wooden structures could be trusted to hold together.<\/p>\r\n\r\n<p>At the mockup inspection in September 1942 the concerns were serious enough that Bell asked to cut the order from 25 aircraft to two. The USAAF agreed, and from that point the programme existed only to learn whether wooden combat aircraft were viable at all.<\/p>\r\n\r\n\r\n<div style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:24px 0\"><iframe class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" src=\"https:\/\/www.youtube.com\/embed\/JH61hxGMSr0\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allowfullscreen><\/iframe><\/div>\r\n<p style=\"font-size:13px;color:#777;text-align:center;margin-top:-10px;font-style:italic\">Dark Skies on the XP-77, America\u2019s wooden emergency fighter.<\/p>\r\n\r\n<h2 style=\"padding-top:22px\">Two and a half years late, and shaking<\/h2>\r\n\r\n<p>The first XP-77 finally flew on 1 April 1944 at Wright Field, by which time the aluminium shortage that justified it had not materialised and the war was being won with metal aeroplanes.<\/p>\r\n\r\n<p>It vibrated badly, because the engine had been bolted directly to the airframe with no vibration isolation. The long nose and rear-set cockpit made it awkward to see out of. And it was slow. Even stripped of guns and armour it did not reach its predicted performance, for the simple reason that it was underpowered.<\/p>\r\n\r\n\r\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px;width:100%\"><img decoding=\"async\" class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" width=\"1024\" src=\"https:\/\/migflug.com\/afterburner\/wp-content\/uploads\/sites\/4\/2026\/09\/bell-xp-77-side-view-43-34915.jpg\" alt=\"Side view of the Bell XP-77 showing the long nose and rear-set canopy\" style=\"width:100%;height:auto;max-width:100%;display:block\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">The profile that caused the problem: a long nose ahead of a cockpit set well aft, which is fine on a racer and unhelpful on a fighter. Photo: USAF, public domain<\/figcaption><\/figure>\r\n<h2 style=\"padding-top:22px\">An Immelmann too far<\/h2>\r\n\r\n<p>Testing moved to the USAAF Proving Ground at Eglin Field with the second aircraft. On 2 October 1944 it entered an inverted spin while attempting an Immelmann turn and did not recover. The pilot bailed out. The aeroplane was destroyed.<\/p>\r\n\r\n<p>All development stopped in December 1944.<\/p>\r\n\r\n<p>The surviving prototype had the saddest ending available to an aeroplane. It went from Wilbur Wright Field to Eglin and back to Wright, appeared at airshows, and was eventually posted to an air base as a gate guard. It stood outside for years, slowly rotting, until somebody burned it.<\/p>\r\n\r\n<h2 style=\"padding-top:22px\">What the XP-77 was actually for<\/h2>\r\n\r\n<p>It is easy to read this as a straightforward failure, and by any performance measure it was. But the lightweight-fighter idea it embodied has never gone away. It came back as the Folland Gnat, as the F-5, as the whole lightweight fighter mafia argument that produced the F-16, and it is back again now in the form of cheap attritable drones designed to be built in large numbers from unexotic materials.<\/p>\r\n\r\n<p>The XP-77 failed on execution, not on premise. Its engine never showed up, its structure was contentious, its cockpit was in the wrong place, and the emergency it was designed for never happened. Every one of those is a reason to cancel an aircraft. None of them is a reason to stop asking the question.<\/p>\r\n\r\n<p><em>Sources: Richard K. Schrader, &ldquo;Bell&rsquo;s Wooden Warrior&rdquo;, <\/em>Air Classics<em>, May 1999; William Green, <\/em>War Planes of the Second World War, Volume Four: Fighters<em>; <\/em>Jane&rsquo;s Fighting Aircraft of World War II<em> (1946); Tony Buttler, <\/em>American Experimental Fighters of WWII<em> (2024).<\/em><\/p>\r\n\r\n\r\n<style>.mfq{margin:34px 0 8px}.mfq h2{font:26px\/1.3 \"Gilroy semiBold\",Helvetica,Arial,sans-serif;color:#0d1117;padding-top:22px;margin:0 0 6px}.mfq .qa details{border-top:1px solid #5C91FF;margin:0;padding:0}.mfq .qa details:last-of-type{border-bottom:1px solid #e2e7ee}.mfq .qa summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px 26px;font:18px\/1.7 \"Gilroy semiBold\",Helvetica,Arial,sans-serif;color:#0d1117}.mfq .qa summary::-webkit-details-marker{display:none}.mfq .qa summary::after{content:\"+\";font:24px Helvetica,sans-serif;color:#3568e0;flex:0 0 auto}.mfq .qa details[open] summary::after{content:\"\\2013\"}.mfq .qa details:hover summary{color:#3568e0}.mfq .qa .a{font:16px\/1.7 \"Gilroy regular\",Helvetica,Arial,sans-serif;color:#454e5e;padding:0 26px 24px}.mfq .qa .a a{color:#3568e0}@media(max-width:680px){.mfq .qa summary{padding:18px 14px;font-size:17px}.mfq .qa .a{padding:0 14px 20px}}<\/style>\r\n\r\n\r\n<section class=\"mfq\"><h2>Frequently Asked Questions<\/h2><div class=\"qa\"><details open><summary>What was the Bell XP-77?<\/summary><div class=\"a\">The XP-77 was an American lightweight fighter prototype of the Second World War, built largely of wood so that it would not consume strategic materials such as aluminium. Two were built. It first flew on 1 April 1944 and the programme was cancelled that December.<\/div><\/details><details><summary>Why was the Bell XP-77 made of wood?<\/summary><div class=\"a\">The US Army Air Forces wanted a fighter that could be built from non-strategic materials in case aluminium became scarce during the war. The XP-77 was designed around that constraint, modelled loosely on the small, clean air racers of the 1930s.<\/div><\/details><details><summary>Why did the Bell XP-77 fail?<\/summary><div class=\"a\">Chiefly because it was underpowered. The supercharged Ranger engine it was designed around slipped by about eighteen months, so it flew with an unsupercharged 520 hp version. It also suffered severe vibration, poor visibility and steady weight growth.<\/div><\/details><details><summary>How many Bell XP-77s were built?<\/summary><div class=\"a\">Two. The USAAF originally recommended 25 aircraft in May 1942, but delays, weight growth and doubts about the wooden structure led Bell to request a cut to two prototypes, which was approved after the September 1942 mockup inspection.<\/div><\/details><details><summary>What happened to the Bell XP-77 prototypes?<\/summary><div class=\"a\">The second aircraft was destroyed on 2 October 1944 at Eglin Field when it entered an inverted spin during an Immelmann turn; the pilot bailed out. The first survived the programme, served as a gate guard at an air base, deteriorated over several years and was then burned.<\/div><\/details><details><summary>How fast was the Bell XP-77?<\/summary><div class=\"a\">Its maximum speed was 330 mph (530 km\/h), with a service ceiling of 30,100 ft. Even without guns or armour fitted it failed to reach the performance originally predicted, because the engine delivered far less power than the design assumed.<\/div><\/details><details><summary>Did the lightweight fighter idea survive the XP-77?<\/summary><div class=\"a\">Yes. The concept reappeared repeatedly, in the Folland Gnat, the Northrop F-5 and the lightweight fighter argument that produced the F-16. It is current again in cheap, attritable uncrewed aircraft designed for mass production.<\/div><\/details><\/div><\/section>\r\n\r\n\r\n\r\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What was the Bell XP-77?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The XP-77 was an American lightweight fighter prototype of the Second World War, built largely of wood so that it would not consume strategic materials such as aluminium. Two were built. 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It is current again in cheap, attritable uncrewed aircraft designed for mass production.\"}}]}<\/script><div style=\"background:#f0f4ff;border-left:4px solid #5C91FF;padding:16px 20px;margin:32px 0 8px\"><p style=\"margin:0 0 8px;font-weight:600;color:#333\">Related Posts<\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/northrop-xp-79-flying-ram-fighter-designed-to-ram-bombers\/\">The Flying Ram: A Fighter Designed to Crash Into Bombers<\/a><\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/fisher-p-75-eagle-parts-bin-fighter-wwii\/\">The Fighter Built From Spare Parts<\/a><\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/curtiss-xp-55-ascender-pusher-canard-fighter\/\">Curtiss Built a Fighter That Flew Tail-First<\/a><\/p><\/div>\r\n","protected":false},"excerpt":{"rendered":"<p>A fighter the size of an air racer, built of wood so it would not use strategic metal. Two flew. One spun in over Florida. The other was left to rot and burned.<\/p>","protected":false},"author":27,"featured_media":23272594,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"editor_notices":[],"footnotes":""},"categories":[666,664],"tags":[],"class_list":["post-23273066","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-history-and-legends","category-military-aviation"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Bell XP-77: America\u2019s Wooden Fighter | MiGFlug<\/title>\n<meta name=\"description\" content=\"Built of wood to save strategic metal, the Bell XP-77 was an air-racer-sized fighter. 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