{"id":19233139,"date":"2026-09-02T12:45:00","date_gmt":"2026-09-02T10:45:00","guid":{"rendered":"https:\/\/migflug.com\/afterburner\/?p=19233139"},"modified":"2026-09-04T08:44:28","modified_gmt":"2026-09-04T06:44:28","slug":"f-16xl-cranked-arrow-wing-f-15e-nasa","status":"publish","type":"post","link":"https:\/\/migflug.com\/afterburner\/it\/f-16xl-cranked-arrow-wing-f-15e-nasa\/","title":{"rendered":"F-16XL: il falco dalla freccia a gomito che perse contro l&#039;aquila d&#039;attacco"},"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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Stretch the fuselage, cram in 65 percent more fuel, and hang bombs from twenty-seven stations. What you get flies farther, carries more and cuts through the sound barrier more sweetly than the jet it came from. What you get is the F-16XL &mdash; and the U.S. Air Force said no.<\/p><p style=\"margin:0 0 18px\">Only two were ever built. They lost the biggest fighter contract of the 1980s, then found a strange second life as some of NASA's most useful research aircraft. The XL is the great \"what if\" of the Viper family.<\/p>\r\n<div style=\"background:#f5f5f5;padding:20px;border-radius:8px;margin:24px 0\"><p style=\"margin:0 0 10px;font-weight:700;font-size:18px\">Quick Facts<\/p><ul style=\"margin:0;padding-left:20px;line-height:1.8\"><li><strong>Type:<\/strong> General Dynamics F-16XL, cranked-arrow delta derivative of the F-16<\/li><li><strong>First flight:<\/strong> July 3, 1982<\/li><li><strong>Built:<\/strong> two (one single-seat, one two-seat)<\/li><li><strong>Wing:<\/strong> roughly double the area; 65% more internal fuel<\/li><li><strong>Payload\/range:<\/strong> about double the bombs, 40% more reach<\/li><li><strong>Verdict:<\/strong> lost the 1984 Dual Role Fighter contest to the F-15E; went to NASA in 1988<\/li><\/ul><\/div>\r\n\r\n<h2 style=\"padding-top:22px\">A wing like a stingray<\/h2><p style=\"margin:0 0 18px\">The XL's signature is that enormous \"cranked-arrow\" wing &mdash; a delta whose leading edge kinks partway out, sharply swept inboard and less so outboard. The shape let the jet slip through supersonic flight with low drag while keeping decent low-speed manners, and it created a huge area for fuel and weapons. General Dynamics stretched the fuselage by around four feet to match.<\/p><p style=\"margin:0 0 18px\">The numbers were startling. The XL could haul roughly twice the bomb load of a standard F-16 and fly about 40 percent farther, all while handling better at high speed. On paper it was exactly the long-range strike fighter the Air Force wanted.<\/p>\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;display:flex;gap:20px;align-items:flex-start\"><div><em>&ldquo;The F-16XL could carry double the payload of the F-16 and travel 40 percent further, its cranked-arrow wing giving supersonic performance without sacrificing subsonic control.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>General Dynamics \/ U.S. Air Force test data<\/strong> &mdash; Enhanced Tactical Fighter evaluation<\/div><\/div><\/div>\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\/f-16xl-twin-duo.jpg\" alt=\"The two F-16XL prototypes\" 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 only two F-16XLs ever built, flying in formation. Photo: NASA via Wikimedia Commons<\/figcaption><\/figure>\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\/YU7-hpErGDU\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;border-radius:8px\" allowfullscreen><\/iframe><\/div>\r\n<p style=\"margin:0 0 18px\"><em>How did the Air Force say no to this?<\/em><\/p><h2 style=\"padding-top:22px\">Beaten by two engines<\/h2><p style=\"margin:0 0 18px\">In 1981 the XL entered the Air Force's Enhanced Tactical Fighter contest &mdash; a fly-off to pick a new deep-strike jet. Its rival was McDonnell Douglas's <a href=\"https:\/\/migflug.com\/aircraft\/f-15e-strike-eagle\/\">F-15E Strike Eagle<\/a>, a two-seat bomber version of the big Eagle. On February 24, 1984, the Air Force chose the F-15E.<\/p><p style=\"margin:0 0 18px\">The reasons were sober rather than damning. The Eagle had two engines to the XL's one &mdash; better survivability on a long mission over hostile ground. It carried less developmental risk, slotted straight into an existing F-15 production line, and left more room to grow. The XL was arguably the more elegant aircraft; the F-15E was the safer bet.<\/p>\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;display:flex;gap:20px;align-items:flex-start\"><div><em>&ldquo;The F-15E offered twin-engine survivability, lower developmental risk, continuity with the F-15 line, and greater future growth potential.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>U.S. Air Force selection decision, February 1984<\/strong> &mdash; Enhanced Tactical Fighter program<\/div><\/div><\/div>\r\n<h2 style=\"padding-top:22px\">The Blackbird's wingman<\/h2><p style=\"margin:0 0 18px\">Losing the contract could have been the end. Instead, in 1988 both XLs went to NASA, which spent the 1990s using them to chase problems no production fighter could. They studied laminar flow across that giant wing, tested advanced flight controls, and probed the shape of the sonic boom itself.<\/p><p style=\"margin:0 0 18px\">The most spectacular experiment paired an XL with an <a href=\"https:\/\/migflug.com\/aircraft\/sr-71-blackbird\/\">SR-71 Blackbird<\/a>. The Viper derivative tucked in astonishingly close beneath the Blackbird as it cruised supersonic, sampling the shock waves rolling off the faster jet to help NASA understand how sonic booms form &mdash; research that feeds directly into today's quiet-supersonic work.<\/p>\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\/f-16xl-nasa-sr-71.jpg\" alt=\"NASA F-16XL and SR-71A\" 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 NASA F-16XL formates on an SR-71A during sonic-boom research. Photo: NASA via Wikimedia Commons<\/figcaption><\/figure>\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\/ecM1-ISNeHE\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;border-radius:8px\" allowfullscreen><\/iframe><\/div>\r\n<p style=\"margin:0 0 18px\"><em>The F-16XL in its own words and images.<\/em><\/p><p style=\"margin:0 0 18px\">Neither XL flies today, but both survive. They are proof that a \"loser\" can still be one of the most interesting aircraft of its generation &mdash; a Fighting Falcon that grew a stingray's wing, out-ranged and out-lifted the original, and then went to work for science instead of war.<\/p>\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\/IcwbpceL1JY\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;border-radius:8px\" allowfullscreen><\/iframe><\/div>\r\n<p style=\"margin:0 0 18px\"><em>Supersizing the Falcon: the story of the cranked-arrow XL.<\/em><\/p><p style=\"margin:0 0 18px\"><em>Sources: Wikipedia (General Dynamics F-16XL); NASA Armstrong\/Dryden; F-16.net; The National Interest.<\/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\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 F-16XL?<\/summary><div class=\"a\">A General Dynamics derivative of the <a href=\"https:\/\/migflug.com\/aircraft\/f-16-fighting-falcon\/\">F-16 Fighting Falcon<\/a> fitted with an enormous cranked-arrow delta wing of roughly double the area, a fuselage stretched about four feet, 65 percent more internal fuel and twenty-seven weapons stations. It first flew on 3 July 1982, and only two were built.<\/div><\/details><details><summary>What is a cranked-arrow wing?<\/summary><div class=\"a\">A delta whose leading edge kinks partway out, sharply swept inboard and less so outboard. The shape allowed low drag through supersonic flight while keeping usable low-speed handling, and created a large area for fuel and weapons.<\/div><\/details><details><summary>How much better was the F-16XL than the F-16?<\/summary><div class=\"a\">It could carry roughly twice the bomb load and fly about 40 percent farther, while handling better at high speed. On paper it was exactly the long-range strike fighter the Air Force said it wanted.<\/div><\/details><details><summary>Why did the Air Force reject the F-16XL?<\/summary><div class=\"a\">It lost the 1984 Dual Role Fighter competition to the <a href=\"https:\/\/migflug.com\/aircraft\/f-15e-strike-eagle\/\">F-15E Strike Eagle<\/a>. The two-engine Eagle offered the redundancy and growth margin the Air Force valued for the deep-strike role, and it was a lower-risk development path.<\/div><\/details><details><summary>What happened to the two F-16XLs?<\/summary><div class=\"a\">They went to NASA in 1988 and became some of its most useful research aircraft, flying supersonic laminar-flow and aerodynamics programmes for years after the Air Force had passed on them.<\/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 F-16XL?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A General Dynamics derivative of the F-16 Fighting Falcon fitted with an enormous cranked-arrow delta wing of roughly double the area, a fuselage stretched about four feet, 65 percent more internal fuel and twenty-seven weapons stations. 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The two-engine Eagle offered the redundancy and growth margin the Air Force valued for the deep-strike role, and it was a lower-risk development path.\"}},{\"@type\":\"Question\",\"name\":\"What happened to the two F-16XLs?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"They went to NASA in 1988 and became some of its most useful research aircraft, flying supersonic laminar-flow and aerodynamics programmes for years after the Air Force had passed on them.\"}}]}<\/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\/nasa-ad-1-oblique-scissor-wing-aircraft\/\">NASA AD-1: The Plane With a Wing That Swung Sideways<\/a><\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/yf-17-cobra-lost-became-fa-18-hornet\/\">The YF-17 Cobra That Lost and Became the Hornet<\/a><\/p><\/div>\r\n","protected":false},"excerpt":{"rendered":"<p>Share this story Take an F-16 Fighting Falcon, throw away its wing, and bolt on a vast cranked-arrow delta that nearly doubles its area. Stretch the fuselage, cram in 65 percent more fuel, and hang bombs from twenty-seven stations. What you get flies farther, carries more and cuts through the sound barrier more sweetly than [&hellip;]<\/p>\n","protected":false},"author":23,"featured_media":19232812,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"editor_notices":[],"footnotes":""},"categories":[666,664],"tags":[],"class_list":["post-19233139","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 v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>F-16XL: The Cranked-Arrow Falcon That Lost to the F-15E | MiGFlug<\/title>\n<meta name=\"description\" content=\"The F-16XL had a huge cranked-arrow wing, double the payload and 40% more range \u2014 but lost to the F-15E, then flew for NASA. 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