{"id":11494105,"date":"2026-08-12T11:07:26","date_gmt":"2026-08-12T09:07:26","guid":{"rendered":"https:\/\/migflug.com\/jetflights\/convair-xp-81-turboprop-escort-fighter\/"},"modified":"2026-08-12T11:22:19","modified_gmt":"2026-08-12T09:22:19","slug":"convair-xp-81-turboprop-escort-fighter","status":"publish","type":"post","link":"https:\/\/migflug.com\/jetflights\/it\/convair-xp-81-turboprop-escort-fighter\/","title":{"rendered":"XP-81, America&#8217;s First Turboprop Escort Fighter"},"content":{"rendered":"<style>.et_pb_title_container h1.entry-title { padding-top: 40px !important; }<\/style><p>From the front it looks like a Mustang that ate a bigger meal. A four-bladed propeller, a long slim nose, a bubble canopy. Then you notice the jet exhaust at the tail, and the Convair XP-81 stops making sense in the best possible way. This was a fighter with two kinds of engine, front and back.<\/p><p>The problem was distance. The Army wanted a fighter that could escort B-29 bombers deep across the Pacific, which meant fuel-sipping range and combat-winning speed in one airframe. No single engine of the day gave both, so Convair used two.<\/p>\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:15px;letter-spacing:.04em;color:#5C91FF\">INFORMAZIONI RAPIDE<\/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\">Tipo<\/td><td style=\"padding:6px 0;color:#444\">Hybrid turboprop\/turbojet escort fighter<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">Primo volo<\/td><td style=\"padding:6px 0;color:#444\">11 February 1945 (on a substitute Merlin)<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">Ruolo<\/td><td style=\"padding:6px 0;color:#444\">Long-range B-29 escort fighter<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">centrale elettrica<\/td><td style=\"padding:6px 0;color:#444\">1 x GE turboprop (nose) + 1 x J33 turbojet (tail)<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">Velocit\u00e0 massima<\/td><td style=\"padding:6px 0;color:#444\">About 507 mph (estimated)<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">Numero costruito<\/td><td style=\"padding:6px 0;color:#444\">2 prototipi<\/td><\/tr><tr><td style=\"padding:6px 14px 6px 0;font-weight:600;color:#333;vertical-align:top;white-space:nowrap\">Destino<\/td><td style=\"padding:6px 0;color:#444\">Cancelled 1947; both survive with the National Museum of the USAF<\/td><\/tr><\/table><\/div>\r\n<h2 style=\"padding-top:22px\">Propeller for cruise, jet for the fight<\/h2><p>A General Electric turboprop in the nose would spin the propeller for efficient long-range cruising. A GE-designed J33 turbojet in the tail would light up for a burst of high speed over the target. It was a clever hedge between the piston age ending and the jet age beginning.<\/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\/Gf_FgA4T2z0\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;border-radius:8px\" allowfullscreen><\/iframe><\/div>\r\n<p>Reality intervened. The turboprop was not ready, so engineers bolted a Packard Merlin from a P-51 into the nose to get flying. On 11 February 1945 the Merlin-powered XP-81 took off at Muroc and handled well, once a bigger tail cured a wobble caused by the long forward fuselage.<\/p>\r\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px;width:100%\"><img data-opt-id=1953268816  fetchpriority=\"high\" decoding=\"async\" class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" width=\"1024\" src=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:Qe0V.cc59\/w:auto\/h:auto\/q:mauto\/ig:avif\/https:\/\/migflug.com\/jetflights\/wp-content\/uploads\/sites\/4\/2026\/08\/convair-xp-81-turboprop-escort-fighter-1.jpg\" alt=\"Convair XP-81 front view showing the nose propeller\" 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\">Propeller in the nose, jet in the tail: the XP-81\u2019s split personality. Photo: U.S. Air Force<\/figcaption><\/figure>\r\n<h2 style=\"padding-top:22px\">First on turboprop power<\/h2><p>Late in 1945 the real turboprop finally went in, and on 21 December the XP-81 became the first American aircraft to fly under turboprop power. But the engine never delivered its promised output, giving no more than the Merlin had, and the performance gains evaporated.<\/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 XP-81 was the first US aircraft to fly powered by a turboprop engine.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>National Museum of the USAF<\/strong> &mdash; museum fact sheet<\/div><\/div><\/div>\r\n<p>With the war over and Pacific bases captured, the need for a long-range escort vanished. The programme was cancelled in 1947 after two prototypes, and the pair were later used as targets on a bombing range.<\/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\/yDbEXoxm1Ec\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;border-radius:8px\" allowfullscreen><\/iframe><\/div>\r\n<p>Both survived that indignity. Today the two XP-81 airframes rest with the National Museum of the United States Air Force, a hybrid experiment that arrived just as the world it was built for disappeared.<\/p>\r\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px;width:100%\"><img data-opt-id=550994044  fetchpriority=\"high\" decoding=\"async\" class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" width=\"1024\" src=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:Qe0V.cc59\/w:auto\/h:auto\/q:mauto\/ig:avif\/https:\/\/migflug.com\/jetflights\/wp-content\/uploads\/sites\/4\/2026\/08\/convair-xp-81-turboprop-escort-fighter-2.jpg\" alt=\"Convair XP-81 in flight\" 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 XP-81 in flight. On 21 December 1945 it became the first US aircraft to fly on turboprop power. Photo: U.S. Air Force<\/figcaption><\/figure>\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;display:flex;gap:20px;align-items:flex-start\"><div><em>&ldquo;The XP-81 was intended to combine jet speed with propeller endurance to meet an escort range requirement of some 1,250 miles.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>White Eagle Aerospace<\/strong> &mdash; aviation-history site<\/div><\/div><\/div>\r\n<p>The hybrid escort fighter that arrived just as its mission disappeared:<\/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\/QX1OrMEs8Qg\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;border-radius:8px\" allowfullscreen><\/iframe><\/div>\r\n<p><em>Sources: National Museum of the USAF; White Eagle Aerospace; Wikipedia.<\/em><\/p>\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\">Post correlati<\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/jetflights\/lockheed-xfv-1-salmon-tailsitter-vtol-fighter\/\">The Navy Fighter That Never Took Off Straight Up<\/a><\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/jetflights\/vought-xf5u-flying-pancake-navy-fighter\/\">Flying Pancake: il caccia della Marina che non ha mai volato<\/a><\/p><\/div>","protected":false},"excerpt":{"rendered":"<p>From the front it looks like a Mustang that ate a bigger meal. A four-bladed propeller, a long slim nose, a bubble canopy. Then you notice the jet exhaust at the tail, and the Convair XP-81 stops making sense in the best possible way. This was a fighter with two kinds of engine, front and [&hellip;]<\/p>\n","protected":false},"author":23,"featured_media":11494113,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"editor_notices":[],"footnotes":""},"categories":[664],"tags":[],"class_list":["post-11494105","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 v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Convair XP-81: Turboprop Escort Fighter<\/title>\n<meta name=\"description\" content=\"The Convair XP-81 was a hybrid turboprop and turbojet escort fighter, the first US aircraft to fly on turboprop power. 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