{"id":3217542,"date":"2026-06-30T17:20:00","date_gmt":"2026-06-30T15:20:00","guid":{"rendered":"https:\/\/migflug.com\/jetflights\/most-expensive-aircraft-program-failures\/"},"modified":"2026-09-04T09:21:30","modified_gmt":"2026-09-04T07:21:30","slug":"echecs-des-programmes-aeronautiques-les-plus-couteux","status":"publish","type":"post","link":"https:\/\/migflug.com\/afterburner\/fr\/most-expensive-aircraft-program-failures\/","title":{"rendered":"L&#039;avion le plus cher qui n&#039;a jamais \u00e9t\u00e9 construit"},"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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Each had serious money, serious engineering and serious ambition behind it. And each ended the same way: cancelled, scrapped or quietly buried after burning through a fortune, without ever doing the job it was built for.<\/p><p>Here are some of the most expensive aircraft failures ever flown &mdash; or, in a couple of cases, never quite flown &mdash; the programmes that prove genius and disaster can look identical right up until the invoice lands.<\/p>\n<div style=\"background:#f0f4ff;border:1px solid #d6e0ff;border-radius:8px;padding:16px 20px;margin:22px 0\"><p style=\"margin:0 0 8px;font-weight:700;color:#1a1a1a\">Quick Facts<\/p><table style=\"border-collapse:collapse;font-size:15px\"><tr><td style=\"padding:6px 14px 6px 0;color:#555;vertical-align:top;white-space:nowrap\"><strong>VH-71 Kestrel<\/strong><\/td><td style=\"padding:6px 0;color:#222\">Over $13 billion &mdash; a presidential helicopter that never carried a president<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;color:#555;vertical-align:top;white-space:nowrap\"><strong>Europe&rsquo;s FCAS \/ NGF<\/strong><\/td><td style=\"padding:6px 0;color:#222\">Estimated \u20ac100 billion+ &mdash; sixth-gen fighter, collapsed in 2026<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;color:#555;vertical-align:top;white-space:nowrap\"><strong>RAH-66 Comanche<\/strong><\/td><td style=\"padding:6px 0;color:#222\">~$7 billion &mdash; stealth helicopter, cancelled with two prototypes<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;color:#555;vertical-align:top;white-space:nowrap\"><strong>Boeing YAL-1<\/strong><\/td><td style=\"padding:6px 0;color:#222\">~$5 billion+ &mdash; a 747 with an anti-missile laser<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;color:#555;vertical-align:top;white-space:nowrap\"><strong>A-12 Avenger II<\/strong><\/td><td style=\"padding:6px 0;color:#222\">~$5 billion &mdash; the Navy&rsquo;s &ldquo;Flying Dorito&rdquo; stealth jet<\/td><\/tr><\/table><\/div>\n<h2 style=\"padding-top:22px\">The RAH-66 Comanche &mdash; $7 billion, never fired a shot<\/h2><p>The Boeing-Sikorsky RAH-66 Comanche was meant to be the U.S. Army&rsquo;s stealthy armed scout, all radar-absorbing angles and internal weapons. After roughly two decades of development and about $7 billion spent, the Army cancelled it in 2004 with only two prototypes flying, choosing to put the money into other helicopters and drones instead. A genuinely advanced aircraft, killed before it ever reached a unit. <a href=\"https:\/\/migflug.com\/afterburner\/rah-66-comanche-the-7-billion-stealth-helicopter-that-never-got-to-fight\/\">Read the full Comanche story here.<\/a><\/p><h2 style=\"padding-top:22px\">The Boeing YAL-1 &mdash; a 747 with a laser cannon<\/h2><p>The YAL-1 took a Boeing 747-400F and packed a megawatt-class chemical laser into its nose, the idea being to burn ballistic missiles out of the sky in their boost phase. It actually worked &mdash; it destroyed test missiles in 2010 &mdash; but the physics were unforgiving: to be useful, the jet would have had to orbit dangerously close to enemy launch sites. After several billion dollars, the programme was cancelled in 2011 and the aircraft was sent to the boneyard.<\/p>\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px\"><img decoding=\"async\" class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" src=\"https:\/\/migflug.com\/afterburner\/wp-content\/uploads\/sites\/4\/2026\/06\/yal-1-airborne-laser-747.jpg\" alt=\"The Boeing YAL-1 Airborne Laser\" style=\"display:block;width:100%;height:auto;border-radius:6px\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">The Boeing YAL-1: a 747 built to shoot down ballistic missiles with a megawatt laser. It worked in tests, and was cancelled anyway. Photo: U.S. Air Force \/ Wikimedia Commons.<\/figcaption><\/figure>\n<h2 style=\"padding-top:22px\">The A-12 Avenger II &mdash; the &ldquo;Flying Dorito&rdquo;<\/h2><p>The Navy&rsquo;s A-12 was a flying-wing stealth attack aircraft so triangular that everyone called it the Flying Dorito. Weight and cost spiralled, the programme fell years behind, and in 1991 Defense Secretary Dick Cheney cancelled it outright after some $5 billion had been spent &mdash; triggering one of the longest-running legal battles in Pentagon history. <a href=\"https:\/\/migflug.com\/afterburner\/a-12-avenger-ii-flying-dorito-cancelled-stealth-bomber\/\">More on the Flying Dorito here.<\/a><\/p><h2 style=\"padding-top:22px\">Europe&rsquo;s FCAS &mdash; \u20ac100 billion, dead on the bench<\/h2><p>The most recent entry is also potentially the most expensive of all. Europe&rsquo;s Future Combat Air System &mdash; the Franco-German-Spanish sixth-generation fighter &mdash; collapsed in 2026 amid an irreconcilable fight between Dassault and Airbus over who would build what. A programme valued in the tens of billions of euros may go down as the costliest fighter cancellation never to produce a flying prototype. <a href=\"https:\/\/migflug.com\/afterburner\/europe-fcas-ngf-fighter-cancelled-dassault-airbus\/\">The full story of FCAS&rsquo;s collapse.<\/a><\/p><h2 style=\"padding-top:22px\">And the reigning champion: the VH-71 Kestrel<\/h2><p>For sheer money-per-aircraft, nothing on this list beats the VH-71 Kestrel: a presidential helicopter whose price climbed past $13 billion &mdash; more than $400 million each &mdash; before it was cancelled in 2009 without ever carrying a president. The finished airframes were eventually sold to Canada for spare parts. <a href=\"https:\/\/migflug.com\/afterburner\/vh-71-kestrel-cancelled-presidential-helicopter\/\">Here is how the $13 billion helicopter died.<\/a><\/p><p>The pattern, across every one of these, is the same: a clever idea, a shifting set of requirements, a budget that quietly doubles, and finally a politician with a red pen. These aircraft are not really monuments to incompetence &mdash; they are monuments to ambition that outran the money. And somewhere right now, the next one is sitting in a wind tunnel.<\/p><p style=\"font-size:13px;color:#777;font-style:italic;margin-top:18px\">Sources: Wikipedia; Congressional Research Service; Defense News.<\/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<!-- mf-faq -->\n\n<div class=\"mf-faq-block\"><style>.mf-faq-block{margin:34px 0}.mf-faq-item:not([open]) .mf-faq-answer{display:none !important}.mf-faq-block h2.mf-faq-h{padding-top:22px;margin-bottom:14px}.mf-faq-item{border:1px solid #e2e8f5;border-radius:8px;margin:0 0 10px;background:#fff}.mf-faq-item summary{list-style:none;cursor:pointer;padding:15px 50px 15px 18px;font-weight:600;color:#1a1a1a;position:relative;line-height:1.45}.mf-faq-item summary::-webkit-details-marker{display:none}.mf-faq-item summary::after{content:\"+\";position:absolute;right:18px;top:50%;transform:translateY(-50%);font-size:1.5em;color:#5C91FF}.mf-faq-item[open] summary::after{content:\"\\2013\"}.mf-faq-answer{padding:14px 18px;color:#333;line-height:1.6}.mf-faq-answer p{margin:0}<\/style><h2 class=\"mf-faq-h\">Related Questions<\/h2><details class=\"mf-faq-item\"><summary>What is the most expensive cancelled aircraft programme?<\/summary><div class=\"mf-faq-answer\"><p>Among the costliest is the VH-71 Kestrel presidential helicopter, whose price passed $13 billion before cancellation in 2009. Europe\\u2019s FCAS fighter, valued in the tens of billions of euros, may prove even more expensive after its 2026 collapse.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>Why do expensive aircraft programmes get cancelled?<\/summary><div class=\"mf-faq-answer\"><p>The common causes are shifting requirements, developing and producing an aircraft at the same time, technical difficulty, and ballooning costs. When the budget grows faster than the capability, governments often cancel the programme, sometimes after spending billions.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>What was the A-12 Avenger II?<\/summary><div class=\"mf-faq-answer\"><p>The A-12 Avenger II was a U.S. Navy stealth attack aircraft with a triangular flying-wing shape, nicknamed the \\u201cFlying Dorito.\\u201d It was cancelled in 1991 after roughly $5 billion was spent, amid weight and cost overruns.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>What was the Boeing YAL-1 Airborne Laser?<\/summary><div class=\"mf-faq-answer\"><p>The YAL-1 was a Boeing 747 fitted with a megawatt-class laser in its nose, intended to shoot down ballistic missiles. It destroyed test missiles in 2010 but was impractical operationally, and the programme was cancelled in 2011.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>Did the RAH-66 Comanche ever enter service?<\/summary><div class=\"mf-faq-answer\"><p>No. The RAH-66 Comanche stealth helicopter was cancelled in 2004 after about two decades of development and roughly $7 billion spent. Only two prototypes were built, and none entered operational service.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>What happened to Europe\\u2019s FCAS fighter?<\/summary><div class=\"mf-faq-answer\"><p>The Future Combat Air System, a joint French, German and Spanish sixth-generation fighter project, collapsed in 2026 due to disputes between Dassault and Airbus over workshare and requirements, after years of expensive development.<\/p><\/div><\/details><\/div>\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is the most expensive cancelled aircraft programme?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Among the costliest is the VH-71 Kestrel presidential helicopter, whose price passed $13 billion before cancellation in 2009. 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Only two prototypes were built, and none entered operational service.\"}},{\"@type\":\"Question\",\"name\":\"What happened to Europe\\\\u2019s FCAS fighter?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The Future Combat Air System, a joint French, German and Spanish sixth-generation fighter project, collapsed in 2026 due to disputes between Dassault and Airbus over workshare and requirements, after years of expensive development.\"}}]}<\/script><!-- \/mf-faq -->\n<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\/vh-71-kestrel-cancelled-presidential-helicopter\/\">The $13 Billion Helicopter That Never Flew a President<\/a><\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/rah-66-comanche-the-7-billion-stealth-helicopter-that-never-got-to-fight\/\">RAH-66 Comanche: The $7 Billion Stealth Helicopter That Never Got to Fight<\/a><\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Share this story Every aircraft on this list looked, on paper, like a brilliant idea. Each had serious money, serious engineering and serious ambition behind it. And each ended the same way: cancelled, scrapped or quietly buried after burning through a fortune, without ever doing the job it was built for. Here are some of [&hellip;]<\/p>\n","protected":false},"author":27,"featured_media":3217460,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"editor_notices":[],"footnotes":""},"categories":[665,666,664],"tags":[],"class_list":["post-3217542","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aviation-world","category-history-and-legends","category-military-aviation"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The Most Expensive Cancelled Aircraft Programs Ever<\/title>\n<meta name=\"description\" content=\"Every aircraft on this list looked, on paper, like a brilliant idea. 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