{"id":10517571,"date":"2026-08-08T13:09:42","date_gmt":"2026-08-08T11:09:42","guid":{"rendered":"https:\/\/migflug.com\/jetflights\/?p=10517571"},"modified":"2026-09-04T08:56:24","modified_gmt":"2026-09-04T06:56:24","slug":"ryan-xv-5-vertifan-lift-fan-vtol","status":"publish","type":"post","link":"https:\/\/migflug.com\/afterburner\/de\/ryan-xv-5-vertifan-lift-fan-vtol\/","title":{"rendered":"Der Jet mit riesigen, in den Fl\u00fcgeln versteckten Ventilatoren"},"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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Ryan&rsquo;s XV-5 Vertifan did something far stranger. It hid two enormous fans inside its wings, spun them with its own jet exhaust, and rose gently into the air through doors that opened in the wing surface.<\/p><p>It was clever, quiet, and genuinely ahead of its time. It was also unforgiving &mdash; and it killed two test pilots before the programme ended.<\/p><p>Yet the idea did not die with the aircraft. The fan buried in the XV-5&rsquo;s wing is a direct ancestor of the lift fan that lets an F-35B hover today.<\/p>\r\n<div style=\"background:#f5f5f5;padding:20px 22px;margin:22px 0;border-radius:8px\"><p style=\"margin:0 0 10px;font-weight:700;font-size:15px;letter-spacing:.03em;color:#5C91FF;text-transform:uppercase\">Quick Facts<\/p><table style=\"width:100%;border-collapse:collapse;font-size:15px\"><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">Aircraft<\/td><td style=\"padding:6px 0;color:#444\">Ryan XV-5 Vertifan<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">Role<\/td><td style=\"padding:6px 0;color:#444\">Experimental V\/STOL (U.S. Army, later NASA)<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">First flight<\/td><td style=\"padding:6px 0;color:#444\">25 May 1964 &mdash; two built<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">Lift system<\/td><td style=\"padding:6px 0;color:#444\">Two wing fans + a nose fan, spun by diverted jet exhaust<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">Fan lift<\/td><td style=\"padding:6px 0;color:#444\">~16,000 lbf &mdash; about three times the engines&rsquo; jet thrust<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">Top speed<\/td><td style=\"padding:6px 0;color:#444\">~547 mph (475 kn)<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">Fate<\/td><td style=\"padding:6px 0;color:#444\">Both aircraft lost in fatal crashes; the concept was vindicated<\/td><\/tr><\/table><\/div>\r\n<h2 style=\"padding-top:22px\">Fans in the wings<\/h2><p>The XV-5A looked, from a distance, like a stubby delta-winged jet not unlike a Douglas <a href=\"https:\/\/migflug.com\/aircraft\/a-4-skyhawk\/\">A-4 Skyhawk<\/a>, with a T-tail and its engine intake perched above a side-by-side cockpit. Its two General Electric J85 turbojets gave conventional thrust for cruise. The trick was what happened when the pilot wanted to hover.<\/p><p>Instead of driving the wheels or a rotor, the engines&rsquo; hot exhaust was diverted outward and blown against turbine blades on the rim of three large fans &mdash; one buried in each wing, and a smaller one in the nose for pitch control. Hinged covers on top of the wings snapped open, and the spinning fans sucked air down through the wing to lift the aircraft. The payoff was remarkable: the fans produced roughly 16,000 pounds of lift, nearly three times what the same engines made as ordinary jets.<\/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;VZ-11: VTOL lift from fans in the wings.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>Flight International<\/strong> &mdash; 1962<\/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\/08\/ryan-xv-5a-vertifan-edwards-afb.png\" alt=\"Ryan XV-5A Vertifan at Edwards AFB\" 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 Army-green XV-5A at Edwards. The covers over the two wing fans are closed here for conventional flight. Photo: U.S. Air Force \/ public domain<\/figcaption><\/figure>\r\n<p>The short documentary below shows the fan-in-wing system opening and lifting the aircraft.<\/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\/1nfv_3JhHDo\" 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\">Fast, quiet &mdash; and treacherous<\/h2><p>In cruise the Vertifan was genuinely quick, touching around 547 mph. In the hover it was eerily quiet, its cool fan exhaust gentle enough to operate from ordinary surfaces that would have been torn up by a Harrier&rsquo;s scorching jets. Contemporary magazines were captivated.<\/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;600-mph Vertifan jet can hover like a copter.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>Popular Science<\/strong> &mdash; September 1966<\/div><\/div><\/div>\r\n<p>But the transition between jet flight and fan-borne flight was abrupt and difficult, and the aircraft demanded constant, precise attention. Both of those traits would prove lethal.<\/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\/PXbL8hjJbOY\" 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\">Two crashes, neither the fans&rsquo; fault<\/h2><p>On 27 April 1965, during a public demonstration, Ryan test pilot Lou Everett inadvertently tripped a conversion switch mounted on the wrong control. The system dutifully programmed the horizontal stabilizer to pitch the nose down almost 45 degrees. Everett ejected near the ground, but his seat had been improperly rigged, and he was killed. The switch was afterwards moved to the instrument panel.<\/p><p>On 5 October 1966 the second aircraft was lost during trials as a rescue platform, when a suspended survivor sling was sucked into a wing fan. Major David Tittle ejected, but only after the aircraft struck the ground, and he did not survive. Investigators noted the grim irony: the damaged fan had kept working well enough to keep flying.<\/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\/08\/ryan-xv-5b-vertifan-with-pilot.jpg\" alt=\"Ryan XV-5B Vertifan with pilot\" 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 rebuilt XV-5B in NASA white. After two fatal crashes, the surviving airframe flew research sorties until 1971. Photo: NASA \/ public domain<\/figcaption><\/figure>\r\n<p>Crucially, neither accident was caused by the lift-fan system itself. The concept, the Army and NASA concluded, actually worked.<\/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\/-aBOmBzcgPE\" 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 idea that outlived the aircraft<\/h2><p>The surviving airframe was rebuilt as the XV-5B and flew research flights for NASA until 1971; it survives today at the U.S. Army Aviation Museum. More importantly, the engineering lived on. The work on moving huge volumes of air through a tip-driven fan fed directly into General Electric&rsquo;s TF39 &mdash; the first high-bypass turbofan, the engine that powers the C-5 Galaxy &mdash; and the whole notion of a lift fan buried in an airframe reappeared, decades later, in the <a href=\"https:\/\/migflug.com\/aircraft\/f-35-lightning-ii\/\">F-35B<\/a>.<\/p><p>The Vertifan was a dead end that led somewhere after all. Two aircraft, two lost pilots, and one very good idea that simply arrived too early.<\/p><p style=\"font-size:13px;color:#777;font-style:italic;margin-top:24px\">Sources: Ryan XV-5 Vertifan (Wikipedia); Ronald M. Gerdes, &ldquo;Lift-Fan Aircraft &mdash; Lessons Learned,&rdquo; NASA (1993); Jane&rsquo;s All the World&rsquo;s Aircraft 1965&ndash;66; Popular Science (Sept 1966); Flight International (1962).<\/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<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\/the-vtol-fighter-that-couldnt-lift-itself\/\">The VTOL Fighter That Couldn&rsquo;t Lift Itself<\/a><\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/the-soviet-jump-jet-that-could-barely-jump\/\">The Soviet Jump Jet That Could Barely Jump<\/a><\/p><\/div>\r\n","protected":false},"excerpt":{"rendered":"<p>Die Ryan XV-5 Vertifan schwebte auf in ihren Tragfl\u00e4chen verborgenen Ventilatoren \u2013 eine geniale, aber t\u00f6dliche Idee, deren Nachfolger die C-5 Galaxy und die F-35B antreiben.<\/p>","protected":false},"author":23,"featured_media":10517198,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"editor_notices":[],"footnotes":""},"categories":[664],"tags":[],"class_list":["post-10517571","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","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>Ryan XV-5 Vertifan: The Jet With Fans in Its Wings<\/title>\n<meta name=\"description\" content=\"The Ryan XV-5 Vertifan hovered on fans buried inside its wings, a brilliant, deadly idea whose descendants power the C-5 and 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