{"id":25029326,"date":"2026-09-27T10:09:46","date_gmt":"2026-09-27T08:09:46","guid":{"rendered":"https:\/\/migflug.com\/afterburner\/akutan-zero-koga-captured-a6m-zero-1942-test-flights\/"},"modified":"2026-10-01T15:12:12","modified_gmt":"2026-10-01T13:12:12","slug":"akutan-zero-koga-captured-a6m-zero-1942-test-flights","status":"publish","type":"post","link":"https:\/\/migflug.com\/afterburner\/it\/akutan-zero-koga-captured-a6m-zero-1942-test-flights\/","title":{"rendered":"Akutan Zero: The Crash That Revealed the Zero&#8217;s Weaknesses"},"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 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Petty Officer Tadayoshi Koga lowered his wheels and set up to land. The grass was hiding water. The moment his main gear touched, it dug into the bog, the fighter pitched over onto its back, and the 19-year-old was killed instantly.<\/p>\r\n\r\n<p>His <a href=\"https:\/\/migflug.com\/aircraft\/a6m-zero\/\">Mitsubishi A6M Zero<\/a> barely suffered. And that is what made the crash of 4 June 1942 one of the most consequential of the Pacific War. Five weeks later, a US Navy patrol crew found the wreck. By September it was flying in American markings over San Diego, and US test pilots were learning, one flight at a time, exactly where the most feared fighter in the Pacific was weak.<\/p>\r\n\r\n\r\n<div style=\"background:#f4f5f7;border:1px solid #e2e7ee;padding:18px 22px;margin:8px 0 28px\"><p style=\"margin:0 0 10px;font-weight:700;font-size:17px\">Quick Facts<\/p><ul style=\"margin:0;padding-left:20px;line-height:1.7\"><li><strong>Aircraft:<\/strong> Mitsubishi A6M2 Model 21 Zero, serial 4593, tail code DI-108<\/li><li><strong>Pilot:<\/strong> Petty Officer Tadayoshi Koga, 19, from the carrier Ryujo<\/li><li><strong>Crash:<\/strong> 4 June 1942, Akutan Island, about 25 miles east of Dutch Harbor, Alaska<\/li><li><strong>Found:<\/strong> 10 July 1942, by the PBY Catalina crew of Lt. William Thies<\/li><li><strong>First US flight:<\/strong> 20 September 1942, flown by Lt. Cmdr. Eddie R. Sanders at NAS North Island, San Diego<\/li><li><strong>Test programme:<\/strong> 24 flights by Sanders between 20 September and 15 October 1942, later tests at Anacostia and NACA Langley<\/li><li><strong>Fate:<\/strong> Destroyed in February 1945 when a taxiing SB2C Helldiver ran into it<\/li><\/ul><\/div>\r\n<h2 style=\"padding-top:22px\">The Raid on Dutch Harbor<\/h2>\r\n\r\n<p>In early June 1942 the Imperial Japanese Navy was running two operations at once. The main effort was Midway. Far to the north, a smaller force including the light carrier Ryujo struck the US base at Dutch Harbor in the Aleutian Islands on 3 and 4 June. Koga flew in a section of three Zeros with Chief Petty Officer Makoto Endo and Petty Officer Tsuguo Shikada.<\/p>\r\n\r\n<p>Over Dutch Harbor, Koga&#39;s fighter was hit. Investigators later found .50-calibre bullet holes and smaller holes, from above and below. One of them had severed the return oil line, and the Zero began trailing oil. Koga throttled back to keep the engine from seizing and headed for Akutan Island, 25 miles to the east.<\/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\/09\/koga-zero-trailing-smoke-dutch-harbor-4-june-1942.jpg\" alt=\"Koga Zero trailing smoke over Dutch Harbor\" style=\"width:100%;height:auto;max-width:100%;display:block\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">A Zero trailing smoke over Dutch Harbor on 4 June 1942. The US Navy caption identifies it as Koga&#39;s damaged fighter shortly before it came down on Akutan. US Navy photo \/ Wikimedia Commons, public domain<\/figcaption><\/figure>\r\n\r\n\r\n<p>Koga never got the chance to learn what went wrong with his landing. His aircraft stayed where it fell, upside down in the marsh, invisible to anyone who did not fly directly over it.<\/p>\r\n\r\n\r\n<div style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:24px 0 6px\"><iframe class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" src=\"https:\/\/www.youtube.com\/embed\/1K7kmsQ52dA\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allowfullscreen><\/iframe><\/div><p style=\"font-size:13px;color:#777;text-align:center;margin:0 0 24px;font-style:italic\">The Smithsonian Channel on how the captured Zero helped US pilots develop new tactics. Video: Smithsonian Channel<\/p>\r\n\r\n\r\n<h2 style=\"padding-top:22px\">Found by a Lost Catalina<\/h2>\r\n\r\n<p>On 10 July 1942 a <a href=\"https:\/\/migflug.com\/aircraft\/pby-catalina\/\">PBY Catalina<\/a> flown by Lieutenant William &quot;Bill&quot; Thies was navigating by dead reckoning in the usual Aleutian murk when Machinist&#39;s Mate Albert Knack spotted wreckage below. It was a Zero, on its back, almost intact.<\/p>\r\n\r\n<p>Thies led a team back to the site on 11 and 12 July. A second party under Lieutenant Robert Kirmse got the aircraft out on 15 July. Koga was buried near the crash site. The Zero went south on the transport USS St. Mihiel, reached Seattle on 1 August and continued by barge to Naval Air Station North Island in San Diego.<\/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\/09\/akutan-zero-crashed-upside-down-akutan-island-1942.jpg\" alt=\"Akutan Zero upside down on Akutan Island\" style=\"width:100%;height:auto;max-width:100%;display:block\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">Koga&#39;s Zero as the US Navy found it on Akutan Island. The soft ground that killed the pilot also saved the airframe. US Navy photo \/ Wikimedia Commons, public domain<\/figcaption><\/figure>\r\n\r\n\r\n<p>Mechanics at North Island straightened the vertical stabiliser, rudder, wing tips, flaps and canopy, and did extensive work on the sheared landing gear struts. The three-bladed Sumitomo propeller was dressed and reused. The red hinomaru came off; American stars went on. On 20 September 1942 the aircraft was airworthy.<\/p>\r\n\r\n<h2 style=\"padding-top:22px\">What Eddie Sanders Found<\/h2>\r\n\r\n<p>Lieutenant Commander Eddie R. Sanders flew the Zero 24 times between 20 September and 15 October 1942. The Zero&#39;s reputation rested on its agility at low speed and its long range, and Sanders confirmed it deserved both. But he also found that the design had paid for its lightness and slow-speed handling with weaknesses a smart American pilot could exploit.<\/p>\r\n\r\n\r\n<div style=\"background:#f8f9fa;border-left:4px solid #1565c0;padding:20px 22px;margin:18px 0 24px;font-size:16px;line-height:1.7;display:flex;gap:20px;align-items:flex-start\"><div><em>&ldquo;The very first flight exposed weaknesses of the Zero which our pilots could exploit with proper tactics... immediately apparent was the fact that the ailerons froze up at speeds above 200 knots.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>Lt. Cmdr. Eddie R. Sanders<\/strong> &mdash; US Navy test pilot, on the first flights of the Akutan Zero<\/div><\/div><\/div>\r\n\r\n\r\n<p>Sanders reported that the Zero rolled to the left far more easily than to the right. Its float-type carburettor also made the engine cut out under negative g. His advice was blunt: go into a vertical power dive, pushing negative g if possible, and open the range while the Zero&#39;s engine was starved. A pursuing Zero pilot who pushed over to follow would lose power at exactly the wrong moment.<\/p>\r\n\r\n<p>The testing did not stop there. The aircraft moved to Anacostia Naval Air Station early in 1943, and in March 1943 went into the Full-Scale Wind Tunnel at the NACA&#39;s Langley laboratory under strict secrecy. Test pilots including Frederick M. Trapnell flew it in performance trials and mock dogfights against American fighters.<\/p>\r\n\r\n\r\n<div style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:24px 0 6px\"><iframe class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" src=\"https:\/\/www.youtube.com\/embed\/F490nIappRo\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allowfullscreen><\/iframe><\/div><p style=\"font-size:13px;color:#777;text-align:center;margin:0 0 24px;font-style:italic\">Period film of a captured Zero being flown by the US Navy in 1942. Video: Aviation videos archives<\/p>\r\n\r\n\r\n<h2 style=\"padding-top:22px\">Treasure, or Just Confirmation?<\/h2>\r\n\r\n<p>How much did one Zero really change? Some Japanese assessments were striking. Masatake Okumiya, a naval aviation officer and later a historian, wrote that the capture was &quot;no less serious than the Japanese defeat at Midway&quot; and did much to hasten Japan&#39;s final defeat. American ace William N. Leonard agreed.<\/p>\r\n\r\n\r\n<div style=\"background:#f8f9fa;border-left:4px solid #5C91FF;padding:20px 22px;margin:18px 0 24px;font-size:16px;line-height:1.7;display:flex;gap:20px;align-items:flex-start\"><div><em>&ldquo;The captured Zero was a treasure. To my knowledge, no other captured machine has ever unlocked so many secrets at a time when the need was so great.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>William N. Leonard<\/strong> &mdash; US Navy fighter ace<\/div><\/div><\/div>\r\n\r\n\r\n<p>Historian John Lundstrom pushed back. He argued that Navy pilots at Coral Sea, Midway and Guadalcanal had already worked out how to fight the Zero before any test data reached them, with tactics such as the <a href=\"https:\/\/migflug.com\/afterburner\/thach-weave-wildcat-zero-beam-defense\/\">Thach Weave<\/a> born in combat. The <a href=\"https:\/\/migflug.com\/aircraft\/f6f-hellcat\/\">F6F Hellcat<\/a>, often said to have been shaped by the Akutan Zero, had already flown in prototype form in June 1942, before Koga&#39;s aircraft was even recovered. What the tests did provide was hard numbers and confirmation: exactly where the Zero stopped rolling and why it could not follow a diving American fighter.<\/p>\r\n\r\n<p>The Akutan Zero ended its career as a training aid at North Island. In February 1945 an <a href=\"https:\/\/migflug.com\/aircraft\/sb2c-helldiver\/\">SB2C Helldiver<\/a> taxiing nearby lost control and ran into it, and its propeller cut the Zero apart. A few gauges and fragments survive at the National Museum of the United States Navy, the Smithsonian and the Alaska Heritage Museum. Koga&#39;s remains were moved to Adak in 1947 and exhumed in 1953, and are believed to have been interred at Chidorigafuchi National Cemetery in Tokyo among unidentified war dead.<\/p>\r\n\r\n\r\n<div style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:24px 0 6px\"><iframe class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" src=\"https:\/\/www.youtube.com\/embed\/t5GOvnsXSXY\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allowfullscreen><\/iframe><\/div><p style=\"font-size:13px;color:#777;text-align:center;margin:0 0 24px;font-style:italic\">A longer documentary on the recovery of the Akutan Zero. Video: Warbirds &amp; Legends<\/p>\r\n\r\n\r\n<p><em>Sources: Wikipedia (Akutan Zero), HISTORY, Smithsonian Channel<\/em><\/p>\n\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\r\n\r\n\r\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>\r\n\r\n\r\n<section class=\"mfq\"><h2>Frequently Asked Questions<\/h2><div class=\"qa\"><details open><summary>What was the Akutan Zero?<\/summary><div class=\"a\">The Akutan Zero was a Mitsubishi A6M2 Zero flown by Petty Officer Tadayoshi Koga that crash-landed on Akutan Island, Alaska, on 4 June 1942 after the raid on Dutch Harbor. Found almost intact by the US Navy in July 1942, it was repaired and flight-tested, revealing the Zero&amp;#39;s weaknesses.<\/div><\/details><details><summary>How did the Akutan Zero crash?<\/summary><div class=\"a\">Koga&amp;#39;s Zero was hit over Dutch Harbor and the return oil line was severed. He tried to land on a grassy flat on Akutan Island that was actually a bog. The landing gear dug in, the aircraft flipped onto its back and Koga, aged 19, was killed. The airframe was only lightly damaged.<\/div><\/details><details><summary>What weaknesses did the US find in the Zero?<\/summary><div class=\"a\">Test pilot Eddie Sanders found that the Zero&amp;#39;s ailerons stiffened badly above about 200 knots, that it rolled much more easily to the left than to the right, and that its float-type carburettor made the engine cut out under negative g. Diving away at high speed became a standard escape.<\/div><\/details><details><summary>Who found the Akutan Zero?<\/summary><div class=\"a\">The wreck was spotted on 10 July 1942 by the crew of a US Navy PBY Catalina flown by Lieutenant William Thies. Machinist&amp;#39;s Mate Albert Knack saw the upturned aircraft. A recovery team under Lieutenant Robert Kirmse extracted it on 15 July 1942.<\/div><\/details><details><summary>Did the Akutan Zero lead to the F6F Hellcat?<\/summary><div class=\"a\">Not directly. The F6F Hellcat prototype had already flown in June 1942, before Koga&amp;#39;s Zero was recovered. The test data gave American pilots and designers precise knowledge of the Zero&amp;#39;s handling limits, but historian John Lundstrom argues Navy pilots had already developed effective anti-Zero tactics in combat.<\/div><\/details><details><summary>What happened to the Akutan Zero?<\/summary><div class=\"a\">The Akutan Zero was used for testing and later as a training aircraft at North Island, San Diego. In February 1945 a taxiing SB2C Helldiver lost control and its propeller cut the Zero apart. Only a few gauges and small fragments survive in US museums.<\/div><\/details><\/div><\/section>\r\n\r\n\r\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What was the Akutan Zero?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The Akutan Zero was a Mitsubishi A6M2 Zero flown by Petty Officer Tadayoshi Koga that crash-landed on Akutan Island, Alaska, on 4 June 1942 after the raid on Dutch Harbor. Found almost intact by the US Navy in July 1942, it was repaired and flight-tested, revealing the Zero&#39;s weaknesses.\"}},{\"@type\":\"Question\",\"name\":\"How did the Akutan Zero crash?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Koga&#39;s Zero was hit over Dutch Harbor and the return oil line was severed. He tried to land on a grassy flat on Akutan Island that was actually a bog. The landing gear dug in, the aircraft flipped onto its back and Koga, aged 19, was killed. The airframe was only lightly damaged.\"}},{\"@type\":\"Question\",\"name\":\"What weaknesses did the US find in the Zero?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Test pilot Eddie Sanders found that the Zero&#39;s ailerons stiffened badly above about 200 knots, that it rolled much more easily to the left than to the right, and that its float-type carburettor made the engine cut out under negative g. Diving away at high speed became a standard escape.\"}},{\"@type\":\"Question\",\"name\":\"Who found the Akutan Zero?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The wreck was spotted on 10 July 1942 by the crew of a US Navy PBY Catalina flown by Lieutenant William Thies. Machinist&#39;s Mate Albert Knack saw the upturned aircraft. A recovery team under Lieutenant Robert Kirmse extracted it on 15 July 1942.\"}},{\"@type\":\"Question\",\"name\":\"Did the Akutan Zero lead to the F6F Hellcat?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Not directly. The F6F Hellcat prototype had already flown in June 1942, before Koga&#39;s Zero was recovered. The test data gave American pilots and designers precise knowledge of the Zero&#39;s handling limits, but historian John Lundstrom argues Navy pilots had already developed effective anti-Zero tactics in combat.\"}},{\"@type\":\"Question\",\"name\":\"What happened to the Akutan Zero?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The Akutan Zero was used for testing and later as a training aircraft at North Island, San Diego. In February 1945 a taxiing SB2C Helldiver lost control and its propeller cut the Zero apart. Only a few gauges and small fragments survive in US museums.\"}}]}<\/script><div style=\"background:#f0f4ff;border-left:4px solid #5C91FF;padding:16px 20px;margin:32px 0 8px\"><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\/thach-weave-wildcat-zero-beam-defense\/\">The Thach Weave: How Two Wildcats Out-Thought the Zero<\/a><\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/f6f-hellcat-ace-maker\/\">The Hellcat: The Ace Maker That Broke the Zero<\/a><\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/tbf-avenger-midway-debut-vt-8-bert-earnest\/\">TBF Avenger at Midway: Six Went Out, One Came Back<\/a><\/p><\/div>\r\n","protected":false},"excerpt":{"rendered":"<p>In June 1942 a 19-year-old Japanese pilot flipped his Zero in an Aleutian bog. The US Navy recovered it almost intact and flew it to find the fighter&#8217;s weak spots.<\/p>","protected":false},"author":27,"featured_media":25028882,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"editor_notices":[],"footnotes":""},"categories":[666,664],"tags":[],"class_list":["post-25029326","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 v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Akutan Zero: The Captured Fighter That Exposed the Zero | MiGFlug<\/title>\n<meta name=\"description\" content=\"The Akutan Zero crashed in an Aleutian bog in 1942. 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