{"id":18294840,"date":"2026-08-30T23:20:33","date_gmt":"2026-08-30T21:20:33","guid":{"rendered":"https:\/\/migflug.com\/afterburner\/flying-flea-mignet-pou-du-ciel\/"},"modified":"2026-09-04T08:45:28","modified_gmt":"2026-09-04T06:45:28","slug":"flying-flea-mignet-pou-du-ciel","status":"publish","type":"post","link":"https:\/\/migflug.com\/afterburner\/flying-flea-mignet-pou-du-ciel\/","title":{"rendered":"Flying Flea: The DIY Plane That Sparked a Deadly Craze"},"content":{"rendered":"<style>.et_pb_title_container h1.entry-title { padding-top: 40px !important; }<\/style>\n<!-- mfsh:top -->\n\n<style>\n.mfsh-trigger{display:inline-flex;align-items:center;gap:10px;height:44px;padding:0 18px;margin:0 0 26px;border:2px solid #0F1720;background:#fff;color:#0F1720;font-family:inherit;font-size:14px;font-weight:700;line-height:1;letter-spacing:0;text-transform:none;cursor:pointer;box-shadow:none;transition:background .15s,color 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Henri Mignet&rsquo;s Flying Flea &mdash; the <em>Pou-du-Ciel<\/em>, or &ldquo;Louse of the Sky&rdquo; &mdash; was a tiny wooden aeroplane that anyone could build in a garden shed from a book of plans, with no pilot&rsquo;s licence and, Mignet cheerfully insisted, barely any flying skill.<\/p>\r\n<p>Thousands believed him. Across France, Britain and beyond, amateurs hammered together Fleas from spruce and fabric and taught themselves to fly. It was the drone craze of its day &mdash; a genuine popular aviation movement.<\/p>\r\n<p>Then the Fleas began to dive into the ground, and no one aboard could pull them out. What began as a joyful democratisation of flight turned, within a couple of years, into one of aviation&rsquo;s most infamous cautionary tales.<\/p>\r\n\r\n<div style=\"background:#f5f5f5;padding:20px 24px;margin:24px 0;border-radius:8px;font-size:15px;line-height:1.8\"><p style=\"margin:0 0 10px;font-weight:700;font-size:17px\">Quick Facts<\/p><strong>Designer:<\/strong> Henri Mignet (1893-1965), France<br><strong>First flight (HM.14):<\/strong> 10 September 1933<br><strong>Plans:<\/strong> &ldquo;Le Sport de l&rsquo;Air&rdquo;, published 1934 (English translation 1935)<br><strong>Configuration:<\/strong> tandem\/staggered wing, two controls (stick + rudder), no ailerons; ~17 hp<br><strong>Dimensions (prototype):<\/strong> span ~19.5 ft (5.9 m), length ~11.5 ft (3.5 m), gross ~450 lb<br><strong>Fatal flaw:<\/strong> unrecoverable pitch-down dive; UK restrictions after the Penshurst crash, 4 May 1936<\/div>\r\n\r\n<h2 style=\"padding-top:22px\">A Model T for the sky<\/h2>\r\n<p>Henri Mignet was a self-taught French designer who wanted an aircraft simple enough for anyone to build and fly. After years of prototypes, he made the first flight of his HM.14 on 10 September 1933. In 1934 he published <em>Le Sport de l&rsquo;Air<\/em>, a book giving complete plans and instructions so readers could construct and fly their own Flea without specialist help. Translated into English in 1935, it prompted hundreds of people around the world to start building.<\/p>\r\n<p>The Flea was deliberately radical. It was a tandem-wing design with just two flying controls &mdash; a stick and a rudder, no ailerons and no rudder pedals. The stick pivoted the front wing to control pitch and worked the large rudder for turns.<\/p>\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\/08\/building-pou-du-ciel-garden.jpg\" alt=\"Building a Pou du Ciel in a garden\" style=\"width:100%;height:auto;max-width:100%;display:block;border-radius:6px\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">The whole point of the Flea: an aeroplane you could build in your own garden. Photo: Wikimedia Commons.<\/figcaption><\/figure>\r\n<h2 style=\"padding-top:22px\">The craze<\/h2>\r\n<p>The little aircraft caught the public imagination completely. By 1936 it was estimated that construction cost about &pound;75 and that some five hundred Fleas were under way in Britain alone. Mignet&rsquo;s original prototype was powered by a modest 17 hp motorcycle engine, spanned about 19.5 ft, and weighed roughly 450 lb gross. It was, by any measure, a genuine people&rsquo;s aeroplane.<\/p>\r\n<p>The appeal was freedom: build it yourself, in your own time, and go flying. For a brief moment the Flea looked like the future of grassroots aviation.<\/p>\r\n\r\n<div style=\"background:#f8f9fa;border-left:4px solid #1565c0;padding:20px 22px;margin:18px 0 24px;border-radius:0 8px 8px 0;font-size:16px;line-height:1.7\"><em>&ldquo;All the components worked, but not together.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>Henri Mignet<\/strong> &mdash; on his early HM.2 design (from Pontois, &ldquo;Biographie d&rsquo;Henri Mignet&rdquo;)<\/div><\/div>\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\/YyrZRZJdNkY\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;border-radius:8px\" allowfullscreen><\/iframe><\/div>\r\n<h2 style=\"padding-top:22px\">The dive with no recovery<\/h2>\r\n<p>Then came the crashes. Under certain conditions the Flea could enter a shallow dive from which no amount of stick could recover it. The cause was a deadly interaction between the two closely spaced wings: when the front wing reached a high angle, airflow deflected off it accelerated over the rear wing, sharply increasing its lift and pushing the nose down. The pilot&rsquo;s instinct, to pull back, only made things worse.<\/p>\r\n<p>Because Mignet had tested his prototype with a low-powered engine, he never met the problem; it emerged only when builders fitted bigger engines. In Britain, restrictions followed a fatal crash at Penshurst airfield, Kent, on 4 May 1936. Wind-tunnel tests at the Royal Aircraft Establishment and in France then pinned down the flaw.<\/p>\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\/08\/mignet-hm14-flying-flea-gaebb.jpg\" alt=\"Surviving 1936 Mignet HM.14 Flying Flea G-AEBB\" style=\"width:100%;height:auto;max-width:100%;display:block;border-radius:6px\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">A surviving 1936-built HM.14, from the height of the Flea craze. Photo: Wikimedia Commons.<\/figcaption><\/figure>\r\n\r\n<div style=\"background:#f8f9fa;border-left:4px solid #5C91FF;padding:20px 22px;margin:18px 0 24px;border-radius:0 8px 8px 0;font-size:16px;line-height:1.7\"><em>&ldquo;Anyone who can nail a packing-case together can build my plane.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>Henri Mignet<\/strong> &mdash; the Flying Flea&rsquo;s creator, on how simple his aeroplane was to build<\/div><\/div>\r\n<h2 style=\"padding-top:22px\">Redeemed, too late<\/h2>\r\n<p>Changes to the airfoil and wing spacing cured it, and later Mignet designs flew perfectly safely &mdash; the basic layout has since proved sound in hundreds of homebuilts and microlights. But the wave of bad publicity had done its damage.<\/p>\r\n<p>The Flea never fully shook its dangerous reputation, and the craze burst as quickly as it had bloomed. Yet Mignet&rsquo;s real legacy survived: the idea that flight need not be the preserve of the rich or the professional &mdash; that an ordinary person, with plans and patience, could build wings in a shed and fly.<\/p>\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\/itMDL-JIFfs\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;border-radius:8px\" allowfullscreen><\/iframe><\/div>\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\/iRS9j732Cw8\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;border-radius:8px\" allowfullscreen><\/iframe><\/div>\r\n<p style=\"font-size:14px;color:#777\"><em>Sources: Wikipedia; Smithsonian National Air and Space Museum; Newark Air Museum; RAF Museum; EAA; &ldquo;Flight&rdquo; magazine archive (1936).<\/em><\/p>\n<!-- mfsh:bottom -->\n\n<button type=\"button\" class=\"mfsh-trigger mfsh-bottom\" data-mfsh-placement=\"bottom\" aria-haspopup=\"dialog\"><svg><use href=\"#mfsh-i-share\"\/><\/svg>Share this story<\/button>\n\n<!-- \/mfsh:bottom -->\n\r\n\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>\n\n\n<section class=\"mfq\"><h2>Frequently Asked Questions<\/h2><div class=\"qa\"><details open><summary>What was the Flying Flea?<\/summary><div class=\"a\">Henri Mignet&rsquo;s HM.14 Pou-du-Ciel, or \"Louse of the Sky\" &mdash; a tiny wooden aircraft that ordinary people could build at home from published plans. It first flew on 10 September 1933, and Mignet published the plans in his 1934 book Le Sport de l&rsquo;Air.<\/div><\/details><details><summary>Could anyone really build and fly one?<\/summary><div class=\"a\">That was the pitch, and thousands believed it. Across France, Britain and beyond, amateurs built Fleas from spruce and fabric and taught themselves to fly, without licences and with almost no instruction. It was a genuine popular aviation movement, the drone craze of its day.<\/div><\/details><details><summary>How did the Flying Flea control work?<\/summary><div class=\"a\">Unusually. It had a tandem, staggered wing arrangement and only two controls, a stick and a rudder, with no ailerons at all. Pitch was controlled by pivoting the front wing.<\/div><\/details><details><summary>What was wrong with the Flying Flea?<\/summary><div class=\"a\">It could enter an unrecoverable pitch-down dive. In certain conditions the aircraft would nose over and no amount of control input could bring it out, which is what turned a joyful democratisation of flight into one of aviation&rsquo;s most infamous cautionary tales.<\/div><\/details><details><summary>What happened to the Flying Flea movement?<\/summary><div class=\"a\">After a series of fatal accidents, including the Penshurst crash on 4 May 1936, Britain imposed restrictions on the type. Wind-tunnel work later identified the aerodynamic cause and modified designs followed, but the craze was over.<\/div><\/details><\/div><\/section>\n\n\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What was the Flying Flea?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Henri Mignet\u2019s HM.14 Pou-du-Ciel, or \\\"Louse of the Sky\\\" \u2014 a tiny wooden aircraft that ordinary people could build at home from published plans. It first flew on 10 September 1933, and Mignet published the plans in his 1934 book Le Sport de l\u2019Air.\"}},{\"@type\":\"Question\",\"name\":\"Could anyone really build and fly one?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"That was the pitch, and thousands believed it. Across France, Britain and beyond, amateurs built Fleas from spruce and fabric and taught themselves to fly, without licences and with almost no instruction. It was a genuine popular aviation movement, the drone craze of its day.\"}},{\"@type\":\"Question\",\"name\":\"How did the Flying Flea control work?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Unusually. It had a tandem, staggered wing arrangement and only two controls, a stick and a rudder, with no ailerons at all. 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Wind-tunnel work later identified the aerodynamic cause and modified designs followed, but the craze was over.\"}}]}<\/script><div style=\"background:#f0f4ff;border-left:4px solid #5C91FF;padding:16px 20px;margin:32px 0 8px;border-radius:0 8px 8px 0\"><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\/christmas-bullet-worst-aircraft-ever-built\/\">Christmas Bullet: The Worst Aircraft Ever Built<\/a><\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/nine-wings-lago-maggiore-caproni-ca60-transaereo\/\">Nine Wings on Lago Maggiore: The Caproni Ca.60<\/a><\/p><\/div>\r\n","protected":false},"excerpt":{"rendered":"<p>Share this story In the mid-1930s, a French carpenter&rsquo;s dream put aviation within reach of the ordinary man. Henri Mignet&rsquo;s Flying Flea &mdash; the Pou-du-Ciel, or &ldquo;Louse of the Sky&rdquo; &mdash; was a tiny wooden aeroplane that anyone could build in a garden shed from a book of plans, with no pilot&rsquo;s licence and, Mignet [&hellip;]<\/p>\n","protected":false},"author":25,"featured_media":18294782,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"editor_notices":[],"footnotes":""},"categories":[665,666],"tags":[],"class_list":["post-18294840","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aviation-world","category-history-and-legends"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Flying Flea: The DIY Plane That Sparked a Deadly Craze | MiGFlug<\/title>\n<meta name=\"description\" content=\"The Flying Flea let anyone build a plane in a shed \u2014 until a hidden pitch flaw caused fatal 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