{"id":15535879,"date":"2026-08-23T17:44:55","date_gmt":"2026-08-23T15:44:55","guid":{"rendered":"https:\/\/migflug.com\/jetflights\/?p=15535879"},"modified":"2026-09-04T08:48:19","modified_gmt":"2026-09-04T06:48:19","slug":"hawker-p1127-harrier-awkward-ancestor","status":"publish","type":"post","link":"https:\/\/migflug.com\/afterburner\/es\/hawker-p1127-harrier-awkward-ancestor\/","title":{"rendered":"Hawker P.1127: El antepasado peculiar del aguilucho"},"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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Before the Hawker Siddeley <a href=\"https:\/\/migflug.com\/aircraft\/harrier-jump-jet\/\">Harrier<\/a> hovered over Falklands task forces and Marine Corps flight decks, there was the Hawker P.1127: a stubby, bug-eyed prototype that looked less like a fighter than an experiment that had escaped the laboratory. It was precisely that.<\/p>\r\n\r\n<p>The problem it set out to solve was brutally simple to state and fiendishly hard to engineer. A jet fighter needs a runway, and runways are the first thing an enemy destroys. Could a high-performance jet instead rise straight up, on nothing but its own thrust, and set down again in a clearing? In the late 1950s almost no one believed it could be done with a single engine and a single pilot.<\/p>\r\n\r\n<p>The P.1127 proved it could. What follows is the story of the engine that made it possible, the test pilot who balanced it on a column of hot gas with his leg in plaster, and the direct line from this awkward machine to the first operational jump jet in service.<\/p>\r\n\r\n\r\n<div style=\"background:#f5f5f5;padding:20px 24px;margin:24px 0;border-radius:8px\"><p style=\"margin:0 0 10px;font-weight:700;font-size:17px;color:#222\">Quick Facts<\/p><table style=\"border-collapse:collapse;font-size:15px;line-height:1.5\"><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">Type<\/td><td style=\"padding:6px 0;color:#444\">Experimental V\/STOL strike aircraft (prototype)<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">Powerplant<\/td><td style=\"padding:6px 0;color:#444\">Bristol Siddeley Pegasus vectored-thrust turbofan (four rotating nozzles)<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">First tethered hover<\/td><td style=\"padding:6px 0;color:#444\">21 October 1960, Dunsfold, pilot Bill Bedford<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">First carrier landing<\/td><td style=\"padding:6px 0;color:#444\">HMS Ark Royal, 8 February 1963 (first jet vertical landing at sea)<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">Evaluation variant<\/td><td style=\"padding:6px 0;color:#444\">Kestrel FGA.1 &mdash; nine built; Tripartite Squadron UK\/US\/West Germany, 1965<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">Direct descendant<\/td><td style=\"padding:6px 0;color:#444\">Hawker Siddeley Harrier &mdash; first operational VTOL jet fighter<\/td><\/tr><\/table><\/div>\r\n\r\n\r\n<h2 style=\"padding-top:22px\">The engine was the aircraft<\/h2>\r\n\r\n<p>The P.1127 is often described as a triumph of airframe design. It was not. It was a triumph of propulsion, wrapped in the minimum airframe needed to carry it. The enabling technology was the Bristol Siddeley Pegasus, a vectored-thrust turbofan whose principle is best understood as controlled redirection: four nozzles, two forward carrying cool fan air and two aft carrying hot exhaust, all rotating together through nearly a right angle. Point them down, and the aircraft rises. Point them back, and it flies. The transition between the two is simply a matter of turning them.<\/p>\r\n\r\n<p>The concept traced to the French designer Michel Wibault. Bristol&rsquo;s engineer Gordon Lewis, working under technical director Stanley Hooker, judged Wibault&rsquo;s engine hopelessly heavy and reworked it around existing components. The airframe side belonged to Hawker: designer Ralph Hooper laid out the aircraft around the engine, and the veteran Sydney Camm oversaw it with characteristic insistence on simplicity.<\/p>\r\n\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;Sophistication means complication, then in turn escalation, cancellation, and finally ruination.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>Sydney Camm<\/strong> &mdash; Hawker chief designer<\/div><\/div>\r\n\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\/08\/hawker-p1127-xp831-prototype.jpg\" alt=\"Hawker P.1127 prototype XP831\" 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 first prototype, XP831. The awkward machine was built around its remarkable engine. Photo: Wikimedia Commons<\/figcaption><\/figure>\r\n\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\/1-GGxkIBntU\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;border-radius:8px\" allowfullscreen><\/iframe><\/div>\r\n\r\n\r\n<h2 style=\"padding-top:22px\">Bedford&rsquo;s tethered leap<\/h2>\r\n\r\n<p>On 21 October 1960 at Dunsfold, test pilot Bill Bedford lifted the first prototype a few feet into the air, tethered inside a wire rig so the machine could not wander or flip. He did so with one leg in plaster, having broken it in a motoring accident shortly before &mdash; a detail so improbable that it has followed the aircraft ever since.<\/p>\r\n\r\n<p>The tether came off on 19 November 1960: the first free hover, a jet balanced on its own downward-pointed exhaust with reaction jets at the nose, tail and wingtips holding it steady where wings and rudder were useless. Conventional flight followed on 13 February 1961, and the crucial full transition from hover to wing-borne flight and back on 8 September 1961. Engineers had feared this moment; in practice it proved almost undramatic, a slow nudge of the nozzle lever.<\/p>\r\n\r\n<p>Not everything was undramatic. At the 1963 Paris Air Show, a speck of dirt jammed the nozzle control and a prototype struck the ground hard; the pilot walked away and the aircraft was rebuilt. Earlier that same year, on 8 February 1963, Bedford had achieved the opposite of embarrassment &mdash; the first vertical landing by a fixed-wing jet onto a carrier at sea, aboard HMS Ark Royal.<\/p>\r\n\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;Oh, Hawker aeroplanes are always beautiful. Vertical first time.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>Sydney Camm<\/strong> &mdash; recounted by Sir Stanley Hooker, on whether to fly conventionally first<\/div><\/div>\r\n\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\/EP93Z5ROE_o\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;border-radius:8px\" allowfullscreen><\/iframe><\/div>\r\n\r\n\r\n<h2 style=\"padding-top:22px\">From Kestrel to Harrier<\/h2>\r\n\r\n<p>The development batch fed directly into a refined machine: the Kestrel FGA.1, with fully swept wings, a taller tail and a more powerful Pegasus. Nine were built. Their purpose was not combat but assessment, and in 1964 they equipped a genuinely unusual unit: the Tripartite Evaluation Squadron, crewed by military pilots from Britain, the United States and West Germany, testing whether V\/STOL could work from rough field sites.<\/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\/08\/hawker-kestrel-xs695.jpg\" alt=\"Hawker Kestrel FGA.1\" 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 Hawker Kestrel FGA.1, the nine-aircraft evaluation development flown by a joint UK\/US\/West German squadron. Photo: Wikimedia Commons<\/figcaption><\/figure>\r\n\r\n\r\n<p>It could. The pilots settled on a signature technique &mdash; short take-off, vertical landing &mdash; that remains the Harrier&rsquo;s operating logic to this day. The lineage from there is direct and unbroken. With the supersonic P.1154 cancelled in 1965, the RAF ordered a Kestrel-derived development aircraft that first flew in 1966 and entered production as the Harrier GR.1 &mdash; the world&rsquo;s first operational VTOL jet fighter. The awkward prototype had become the template.<\/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\/peLuz6ORyP8\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;border-radius:8px\" allowfullscreen><\/iframe><\/div>\r\n\r\n\r\n<p style=\"font-style:italic;color:#666;font-size:14px\">Sources: Wikipedia (Hawker Siddeley P.1127; Bristol Siddeley Pegasus); Francis K. Mason, The Hawker P.1127 and Kestrel; Imperial War Museums; Brooklands Museum.<\/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\r\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\/yakovlev-yak-141-freestyle\/\">Soviet Supersonic Jump Jet Hidden Inside the F-35B<\/a><\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/rolls-royce-flying-bedstead-thrust-measuring-rig-vtol\/\">The Flying Bedstead That Taught Britain to Hover<\/a><\/p><\/div>\r\n","protected":false},"excerpt":{"rendered":"<p>The stubby Hawker P.1127, balanced on a column of hot gas by a test pilot with his leg in plaster, grew up to become the Harrier jump jet.<\/p>","protected":false},"author":23,"featured_media":15535556,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"editor_notices":[],"footnotes":""},"categories":[666,664],"tags":[],"class_list":["post-15535879","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>Hawker P.1127: The Harrier&#039;s Ancestor<\/title>\n<meta name=\"description\" content=\"The stubby Hawker P.1127, balanced on a column of hot gas by a test pilot with his leg in plaster, grew up to become the Harrier jump jet.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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