{"id":859940,"date":"2026-05-15T09:00:00","date_gmt":"2026-05-15T07:00:00","guid":{"rendered":"https:\/\/migflug.com\/jetflights\/?p=859940"},"modified":"2026-10-02T22:46:05","modified_gmt":"2026-10-02T20:46:05","slug":"the-xf-85-goblin-the-parasite-fighter-that-couldnt-get-home","status":"publish","type":"post","link":"https:\/\/migflug.com\/afterburner\/the-xf-85-goblin-the-parasite-fighter-that-couldnt-get-home\/","title":{"rendered":"The XF-85 Goblin: The Parasite Fighter That Couldn&#8217;t Get Home"},"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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A fighter with no landing gear \u2014 because it was never supposed to land. A fighter designed to be stored in a bomb bay, dropped into combat, and then retrieved by flying back up to a moving bomber and hooking onto a trapeze dangling from its belly at 200 miles per hour. In turbulence. While both aircraft were flying. Now picture doing this in 1948, with 1948 avionics, and you start to understand why the McDonnell XF-85 Goblin is one of the most audaciously weird aircraft ever built \u2014 and why it failed.<\/p>\n\n<p>The Goblin was not a joke. It emerged from a genuine and serious tactical problem: the Convair B-36 Peacemaker, America's primary strategic nuclear bomber, could fly nearly any target on earth but was slow, unmaneuverable, and desperately vulnerable to fighter interception. Escort fighters of the late 1940s lacked the range to accompany a B-36 on a 10,000-mile round trip to Moscow. So someone \u2014 many someones, apparently \u2014 thought: what if the B-36 carried its own escort fighters inside it? The concept was called a \"parasite fighter,\" and the Goblin was the <a href=\"https:\/\/migflug.com\/air-forces\/united-states-air-force\/\">US Air Force<\/a>'s most ambitious attempt to make it work. It almost worked. Almost.<\/p>\n\n<p>Today, one XF-85 Goblin sits in the National Museum of the United States Air Force in Dayton, Ohio. It is 14 feet and 10 inches long. Children stare at it. Adults laugh, then look closer, then stop laughing. Because the more you look at the Goblin, the more you realize that the men who built it were not crazy. They were just trying to solve an impossible problem, and they came disconcertingly close.<\/p>\n\n\n<div style=\"background:#f0f0f0;border-left:4px solid #5C91FF;padding:16px 20px;margin:20px 0 28px;border-radius:0 8px 8px 0\"><p style=\"margin:0 0 8px;font-weight:600;color:#333;font-size:17px\">Quick Facts<\/p>\n<p style=\"margin:4px 0\"><strong>Aircraft:<\/strong> McDonnell XF-85 Goblin<\/p>\n<p style=\"margin:4px 0\"><strong>Role:<\/strong> Parasite fighter (carried inside B-36 bomb bay)<\/p>\n<p style=\"margin:4px 0\"><strong>First flight:<\/strong> August 23, 1948 (from EB-29 mothership)<\/p>\n<p style=\"margin:4px 0\"><strong>Engine:<\/strong> Westinghouse J34-WE-22 turbojet, 3,000 lb thrust<\/p>\n<p style=\"margin:4px 0\"><strong>Top speed:<\/strong> 648 mph (estimated &mdash; never demonstrated in flight)<\/p>\n<p style=\"margin:4px 0\"><strong>Length:<\/strong> 14 ft 10 in \u2014 the smallest American jet fighter ever built<\/p>\n<p style=\"margin:4px 0\"><strong>Weight:<\/strong> 3,740 lb empty<\/p>\n<p style=\"margin:4px 0\"><strong>Landing gear:<\/strong> None (designed to hook back onto mothership)<\/p>\n<p style=\"margin:4px 0\"><strong>Test pilot:<\/strong> Edwin Schoch<\/p>\n<p style=\"margin:4px 0\"><strong>Total built:<\/strong> 2 prototypes<\/p>\n<p style=\"margin:4px 0\"><strong>Cancelled:<\/strong> October 24, 1949<\/p>\n<p style=\"margin:4px 0\"><strong>Surviving example:<\/strong> NMUSAF, Dayton, Ohio<\/p>\n<\/div>\n\n\n<h2 style=\"padding-top:22px\">The Problem: A Bomber That Could Go Anywhere, Defended by Nothing<\/h2>\n\n<p>The Convair B-36 Peacemaker was, by any measure, an extraordinary machine. Powered by six piston engines plus four jet pods \u2014 \"six turning, four burning\" in the parlance of its crews \u2014 it could carry a nuclear weapon from bases in the continental United States to any point in the Soviet Union and return without refueling. Its service ceiling of 45,000 feet and its cruising altitude of 40,000-plus feet put it above most Soviet fighters of the late 1940s. It was the Air Force's primary deterrent, the weapon that kept the Cold War cold.<\/p>\n\n<p>But the Korean War and the rapid improvement of Soviet jet fighter technology made it clear that the B-36's high altitude was not permanent protection. Soviet <a href=\"https:\/\/migflug.com\/aircraft\/mig-15-fagot\">MiG-15s<\/a>, appearing in Korea in late 1950, demonstrated performance that was genuinely alarming \u2014 a swept-wing jet with a service ceiling near 50,000 feet and a climb rate that could catch a B-36 before it reached its cruising altitude. B-36 crews needed escort fighters. But the distances involved \u2014 round trips of 8,000 to 12,000 miles \u2014 made conventional escort impossible. No fighter in 1949 had anything close to that range.<\/p>\n\n\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\/05\/Convair_B-36_Peacemaker.jpg\" alt=\"Convair B-36 Peacemaker \u2014 the strategic bomber the XF-85 Goblin was designed to protect\" style=\"display:block;width:100%!important;max-width:100%!important;height:auto!important;border-radius:6px\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">The Convair B-36 Peacemaker \u2014 \"six turning, four burning.\" The B-36 could reach any target on earth but was vulnerable to interception. The XF-85 was conceived to ride in its bomb bay and defend it. Wikimedia Commons<\/figcaption><\/figure>\n\n\n<p>The parasite fighter concept was not new in 1948. The US Navy had experimented with airship-launched fighters in the 1930s, and the Soviets had briefly explored \"Zveno\" projects where biplane fighters were launched from and recovered to mothership bombers. What was new in the postwar era was the combination of jet propulsion and thermonuclear stakes: if a B-36 went down before delivering its weapon, the strategic mission failed. The Air Force wanted fighters that could go with the bombers all the way to the target. If the fighters had to live inside the bombers, so be it.<\/p>\n\n<h2 style=\"padding-top:22px\">The Goblin: Engineering a Miracle in Miniature<\/h2>\n\n<p>McDonnell Aircraft Corporation received the contract in 1945, before the B-36 had even entered service. The specification was daunting: a jet fighter small enough to fit inside a B-36 bomb bay (roughly 33 feet long and 5 feet wide), capable of at least Mach 0.8, armed with four .50-caliber machine guns, and able to be deployed from and retrieved by the mothership in flight. It had to be a real fighter \u2014 not a missile, not a drone, not a toy \u2014 capable of engaging Soviet interceptors in a turning dogfight.<\/p>\n\n<p>The design team at McDonnell, under chief engineer Herman Barkey, produced something that looks, in photographs, like a fever dream: a tiny egg-shaped fuselage with small swept-back folding wings, a nose intake for the single Westinghouse J34 turbojet, and a forked tail with an array of small fins arranged like fletching on an arrow. There was no landing gear \u2014 the Goblin was never expected to touch a runway. Instead, a retractable hook on the upper fuselage would catch the trapeze mechanism lowered from the mothership's bomb bay, allowing the Goblin to be winched back aboard while both aircraft flew in close formation. The hook was the Goblin's only way home.<\/p>\n\n\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\/05\/McDonnell_XF-85_Goblin_and_EB-29_mothership.jpg\" alt=\"XF-85 Goblin alongside its EB-29 mothership during ground operations\" style=\"display:block;width:100%!important;max-width:100%!important;height:auto!important;border-radius:6px\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">The XF-85 Goblin alongside the EB-29 Superfortress used as a test mothership \u2014 the B-36 was not yet available for flight tests. The scale difference is striking: the Goblin is tiny even next to a B-29. Wikimedia Commons<\/figcaption><\/figure>\n\n\n<p>The Goblin was quick. Its estimated top speed of 648 mph was respectable for 1948 \u2014 but it was never demonstrated in testing, though the MiG-15 it was designed to fight was faster. It handled reasonably well at cruise speeds. The swept X-wing configuration gave it adequate stability and sufficient lift for the performance envelope. On paper, as a pure performance exercise, the Goblin was a credible little interceptor. The problem was not the airplane. The problem was the hook.<\/p>\n\n<h2 style=\"padding-top:22px\">Edwin Schoch and the Impossible Trapeze<\/h2>\n\n<p>Test pilot Edwin Schoch flew the XF-85 program, and his experience with the retrieval system is one of the great cautionary tales in aerospace history. The trapeze \u2014 a retractable boom and hook-catch assembly lowered from the mothership's bomb bay \u2014 seemed simple enough in ground testing. In the air, it was a different matter entirely.<\/p>\n\n<p>The aerodynamic environment directly behind and below a large bomber at altitude is violent and chaotic. The B-36's wake \u2014 the turbulent air disrupted by its massive wing and fuselage \u2014 created a zone of unpredictable buffeting immediately below and aft of the aircraft. The EB-29 used for initial Goblin tests (the B-36 was not yet available) had similar wake characteristics at a smaller scale. Schoch described flying the Goblin in close proximity to the mothership as like trying to thread a needle while riding a mechanical bull. The Goblin was tossed by wake turbulence just as it needed to be positioned with millimeter precision to catch the trapeze hook.<\/p>\n\n\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\/05\/McDonnell_XF-85_trapese.jpg\" alt=\"XF-85 Goblin on the trapeze hook beneath the EB-29 mothership\" style=\"display:block;width:100%!important;max-width:100%!important;height:auto!important;border-radius:6px\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">The XF-85 Goblin hanging from the trapeze hook beneath the EB-29 mothership \u2014 the only way the Goblin could \"land.\" In 7 free flights, only 3 ended in a successful hookup. The turbulence under the bomber made precise station-keeping nearly impossible. Wikimedia Commons<\/figcaption><\/figure>\n\n\n<p>In seven free flights of the Goblin between August 1948 and April 1949, only three ended in a successful hookup &mdash; the rest ended in emergency belly landings on the dry lakebed. The other six attempts required multiple passes, with the Goblin bouncing and yawing in the bomber's wake while Schoch tried to coax the tiny aircraft into position. On one occasion, the Goblin struck the trapeze so hard during a retrieval attempt that the canopy was shattered and Schoch's helmet visor was cracked. He was lucky not to be killed. On another, the turbulence threw the Goblin so far off line that he had to break away and orbit for several minutes before attempting again.<\/p>\n\n<p>It is worth pausing on this. The entire concept of the parasite fighter depended on retrieval. A fighter that could not reliably return to its mothership was a one-use weapon \u2014 a flying kamikaze with better-than-average aerodynamics. For the Goblin to function as intended, a pilot would need to accomplish in combat \u2014 possibly after a turning dogfight, possibly damaged, possibly in formation with Soviet fighters \u2014 what Schoch could barely accomplish in ideal test conditions. The retrieval problem was not a bug that could be engineered away. It was fundamental to the physics of the situation.<\/p>\n\n\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\">\n<em>Recovering the Goblin to the trapeze demanded extraordinary airmanship: the turbulence directly behind the mothership was severe and unpredictable, and a sudden gust could throw the tiny fighter off line at the final moment. The concept was sound &mdash; the execution, in the actual aerodynamic environment of a large bomber, proved nearly impossible.<\/em>\n<div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>Edwin Schoch<\/strong> &mdash; McDonnell Test Pilot, XF-85 Goblin program, 1948\u20131949<\/div>\n<\/div>\n\n\n<h2 style=\"padding-top:22px\">Cancellation, Consolation, and the Curse of the Parasite Fighter<\/h2>\n\n<p>The XF-85 program was cancelled on October 24, 1949. The official reasons were the retrieval problem and the Goblin's inadequate performance relative to the Soviet MiG-15, which had appeared that year and was demonstrably superior. But there was a third factor: aerial refueling. The development of practical airborne refueling for jet aircraft \u2014 the probe-and-drogue system that Boeing was perfecting \u2014 offered an alternative solution to the bomber escort problem that did not require carrying miniature fighters in bomb bays. A Republic F-84 Thunderjet that could be refueled in flight by a KC-97 tanker could escort a B-36 over far greater distances than any parasite fighter ever could.<\/p>\n\n<p>The Air Force did not entirely abandon the parasite fighter concept, however. Two follow-on programs attempted to succeed where the Goblin had failed. The Republic RF-84K FICON (Fighter Conveyor) project mounted a modified F-84 below a GRB-36 bomber, which the fighter could dock with in flight via a retractable yoke. The F-84 was a larger, more capable aircraft than the Goblin \u2014 but the docking problem remained. And Project Tom-Tom, in 1953, attempted to carry F-84s on the wingtips of a B-36, tethered by flexible couplings. On one test flight, the wingtip F-84 began oscillating in the bomber's wake so severely that it nearly tore the B-36's wing off. The pilot emergency-released and landed separately. Tom-Tom was cancelled immediately.<\/p>\n\n\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\/05\/McDonnell_27E_XF-85-MC_Goblin_-USAAF_sn_46-523-_cn_1-_-5-22-2022-.jpg\" alt=\"XF-85 Goblin at the National Museum of the United States Air Force Dayton Ohio\" style=\"display:block;width:100%!important;max-width:100%!important;height:auto!important;border-radius:6px\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">The surviving XF-85 Goblin at the National Museum of the United States Air Force in Dayton, Ohio. It is 14 feet 10 inches long \u2014 the smallest American jet fighter ever built. This aircraft (serial 46-523) is one of two built. Wikimedia Commons<\/figcaption><\/figure>\n\n\n<p>Every parasite fighter program failed for essentially the same reason: the aerodynamic environment around a large bomber in flight is inherently hostile to precise formation flying by a smaller aircraft. The wake turbulence is violent, unpredictable, and unavoidable. What works in a wind tunnel does not always work in the sky behind 500,000 pounds of moving aluminum.<\/p>\n\n<p>The surviving XF-85 \u2014 serial number 46-523, the first prototype \u2014 arrived at the NMUSAF in 1950 and has been on display ever since; the second prototype, 46-524, also survives, at the Strategic Air Command &amp; Aerospace Museum in Ashland, Nebraska. It is, by any measure, a strange thing to look at: comically small, perched on a stand designed for a much larger aircraft, its four tiny wings folded like a dragonfly at rest. Visitors often mistake it for a scale model. When they realize it is full size, their expressions change.<\/p>\n\n<p>There is something poignant about the Goblin. It represents an engineering team working with complete seriousness on a problem that turned out to be unsolvable \u2014 not because the concept was crazy, but because physics is inflexible. The hook worked in the hangar. The bomber's wake ruined it in the air. The gap between what you can build and what you can operate is often the most important engineering lesson of all, and the Goblin taught it with perfect clarity. In the 1948 test program over Muroc Air Force Base, Edwin Schoch proved something invaluable: some ideas that look brilliant on paper are simply, stubbornly impossible in the sky.<\/p>\n\n<p><em>Sources: Jay Miller, \"The McDonnell XF-85 Goblin\"; National Museum of the United States Air Force; Peter Bowers, \"United States Military Aircraft Since 1909\"; Tony Buttler, \"American Secret Projects: Fighters and Interceptors 1945\u20131978\"; Wikipedia; Wikimedia Commons<\/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\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;user-select:none}.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;font-weight:400;color:#5C91FF;line-height:1}.mf-faq-item[open] summary::after{content:\"\\2013\"}.mf-faq-item[open] summary{border-bottom:1px solid #eef1f8}.mf-faq-item summary:hover{background:#f5f8ff}.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 was the McDonnell XF-85 Goblin?<\/summary><div class=\"mf-faq-answer\"><p>The McDonnell XF-85 Goblin was a tiny American \"parasite\" jet fighter designed to be carried inside the bomb bay of a Convair B-36 bomber, dropped in combat, and then retrieved in mid-air by hooking onto a trapeze. First flown in 1948, it was the smallest U.S. jet fighter ever built.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>Why was the XF-85 Goblin built?<\/summary><div class=\"mf-faq-answer\"><p>The Goblin was meant to solve the problem of defending the Convair B-36, a strategic bomber that could fly farther than any escort fighter. By carrying its own parasite fighter inside the bomb bay, the bomber could deploy fighter protection deep over enemy territory.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>Why did the XF-85 Goblin fail?<\/summary><div class=\"mf-faq-answer\"><p>The Goblin had no landing gear and depended on hooking back onto a trapeze beneath its mothership at around 200 mph, an extremely difficult maneuver, especially in turbulence. The mid-air retrieval proved too hard to perform reliably, and the program was cancelled in October 1949.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>How big was the XF-85 Goblin?<\/summary><div class=\"mf-faq-answer\"><p>The Goblin was just 14 feet 10 inches long and weighed about 3,740 lb empty, making it the smallest American jet fighter ever built, roughly the size of a compact car. Only two prototypes were ever constructed.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>Does an XF-85 Goblin still exist?<\/summary><div class=\"mf-faq-answer\"><p>Yes. A surviving XF-85 Goblin is preserved at the National Museum of the United States Air Force in Dayton, Ohio. Two prototypes were built before the program was cancelled in October 1949.<\/p><\/div><\/details><\/div>\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What was the McDonnell XF-85 Goblin?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The McDonnell XF-85 Goblin was a tiny American \\\"parasite\\\" jet fighter designed to be carried inside the bomb bay of a Convair B-36 bomber, dropped in combat, and then retrieved in mid-air by hooking onto a trapeze. First flown in 1948, it was the smallest U.S. jet fighter ever built.\"}},{\"@type\":\"Question\",\"name\":\"Why was the XF-85 Goblin built?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The Goblin was meant to solve the problem of defending the Convair B-36, a strategic bomber that could fly farther than any escort fighter. 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A surviving XF-85 Goblin is preserved at the National Museum of the United States Air Force in Dayton, Ohio. Two prototypes were built before the program was cancelled in October 1949.\"}}]}<\/script><!-- \/mf-faq -->\n\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\">More History & Legends from the MiGFlug Blog<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Share this story Picture, if you will, a jet fighter the size of a compact car. A fighter with no landing gear \u2014 because it was never supposed to land. A fighter designed to be stored in a bomb bay, dropped into combat, and then retrieved by flying back up to a moving bomber and [&hellip;]<\/p>\n","protected":false},"author":27,"featured_media":859934,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"editor_notices":[],"footnotes":""},"categories":[666,664],"tags":[],"class_list":["post-859940","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 v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The XF-85 Goblin: The Parasite Fighter That Couldn&#039;t Get Home | Afterburner - MiGFlug&#039;s Magazine<\/title>\n<meta name=\"description\" content=\"Picture, if you will, a jet fighter the size of a compact car. 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