{"id":980776,"date":"2026-05-18T11:18:09","date_gmt":"2026-05-18T09:18:09","guid":{"rendered":"https:\/\/migflug.com\/jetflights\/the-teenager-who-invented-the-autopilot-eleven-years-after-kitty-hawk\/"},"modified":"2026-06-25T15:10:23","modified_gmt":"2026-06-25T13:10:23","slug":"the-teenager-who-invented-the-autopilot-eleven-years-after-kitty-hawk","status":"publish","type":"post","link":"https:\/\/migflug.com\/afterburner\/fr\/the-teenager-who-invented-the-autopilot-eleven-years-after-kitty-hawk\/","title":{"rendered":"L&#039;adolescente qui a invent\u00e9 le pilote automatique \u2014 onze ans apr\u00e8s Kitty Hawk"},"content":{"rendered":"<style>.et_pb_title_container h1.entry-title { padding-top: 40px !important; }<\/style>\n<p>On the morning of 18 June 1914 \u2014 ten years and six months after Orville Wright lifted off Kitty Hawk \u2014 a 21-year-old American named Lawrence Burst Sperry flew a Curtiss C-2 biplane down the Seine at 50 feet above the water in front of a crowd of astonished Parisians. Halfway through the demonstration, he stood up in the cockpit and lifted both hands above his head. His mechanic, \u00c9mile Cachin, climbed out of the cockpit, walked along the lower wing, and balanced on the wingtip. The aircraft kept flying perfectly straight and level. The crowd, the French aviation press, and the panel of judges from the Aero-Club de France lost their minds.<\/p><p>The two men had just publicly demonstrated the world's first practical autopilot. They won the 50,000-franc Concours de la S\u00e9curit\u00e9 prize. And they invented, almost as a side effect, the modern airliner.<\/p>\n\n<div style=\"background:#f5f5f5;border-radius:8px;padding:18px 22px;margin:20px 0 28px;border-left:4px solid #5C91FF\"><div style=\"font-weight:700;color:#333;margin-bottom:10px;font-size:15px;letter-spacing:0.3px\">QUICK FACTS<\/div><table style=\"border-collapse:collapse;width:100%;font-size:15px;line-height:1.5\"><tr><td style=\"padding:6px 12px 6px 0;color:#555;font-weight:600;white-space:nowrap;vertical-align:top\">Inventor<\/td><td style=\"padding:6px 0\">Lawrence Burst Sperry (1892\u20131923), American aviator and engineer<\/td><\/tr><tr><td style=\"padding:6px 12px 6px 0;color:#555;font-weight:600;white-space:nowrap;vertical-align:top\">Company<\/td><td style=\"padding:6px 0\">Sperry Gyroscope Company (founded 1910 by Elmer A. Sperry, Lawrence's father)<\/td><\/tr><tr><td style=\"padding:6px 12px 6px 0;color:#555;font-weight:600;white-space:nowrap;vertical-align:top\">Device<\/td><td style=\"padding:6px 0\">Three-axis gyroscopic stabiliser (\"Autopilot\")<\/td><\/tr><tr><td style=\"padding:6px 12px 6px 0;color:#555;font-weight:600;white-space:nowrap;vertical-align:top\">Public debut<\/td><td style=\"padding:6px 0\">18 June 1914, Bezons, on the Seine northwest of Paris<\/td><\/tr><tr><td style=\"padding:6px 12px 6px 0;color:#555;font-weight:600;white-space:nowrap;vertical-align:top\">First flight test<\/td><td style=\"padding:6px 0\">1912, US Navy Curtiss F flying boat<\/td><\/tr><tr><td style=\"padding:6px 12px 6px 0;color:#555;font-weight:600;white-space:nowrap;vertical-align:top\">Year of patent<\/td><td style=\"padding:6px 0\">US Patent 1,415,003, &ldquo;Automatic Pilot for Aeroplanes&rdquo; (filed 1916, granted 1922)<\/td><\/tr><tr><td style=\"padding:6px 12px 6px 0;color:#555;font-weight:600;white-space:nowrap;vertical-align:top\">Lifetime patents<\/td><td style=\"padding:6px 0\">23 aircraft-related patents at time of death (age 31)<\/td><\/tr><\/table><\/div>\n\n<h2 style=\"padding-top:22px\">A teenager who solved straight-and-level<\/h2><p>Lawrence Sperry was the son of Elmer Ambrose Sperry, the inventor of the marine gyrocompass and one of the foundational figures of American precision engineering. By the time Lawrence was fifteen, he had taught himself to fly on a Burgess-Wright biplane. By eighteen, he had earned his pilot's certificate. By twenty, he was an engineer at his father's company in Brooklyn \u2014 a company that was the world's leading authority on gyroscope-based stabilisation systems. The Sperry family's gyrocompasses were already installed on every major US Navy battleship of the day.<\/p><p>Lawrence's realisation was that the same gyroscope that kept a battleship pointing north could be made to keep an aircraft flying straight and level. Three gyroscopes \u2014 one for pitch, one for roll, one for yaw \u2014 could be connected through electric servomotors to the aircraft's control surfaces. If the aircraft deviated from straight-and-level flight, the gyroscopes would sense the deviation and the servomotors would move the controls to correct it. The pilot, theoretically, did nothing.<\/p>\n\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px\"><img data-opt-id=1655497554  fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/d\/d7\/Lawrence_Burst_Sperry.jpg?utm_source=commons.wikimedia.org&utm_campaign=imageinfo&utm_content=thumbnail_unscaled\" alt=\"Lawrence Burst Sperry\" 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\">Lawrence Burst Sperry, age approximately 28, with one of his earlier-generation autopilot installations. He was killed in 1923 when his aircraft ditched in the English Channel \u2014 at age 31, with 23 patents to his name. Photo: Wikimedia Commons<\/figcaption><\/figure>\n\n<h2 style=\"padding-top:22px\">The Curtiss flying-boat tests<\/h2><p>The first flight test of the Sperry stabiliser was conducted in late 1912 on a Curtiss F flying boat at Hammondsport, New York. The aircraft would take off, climb to a few hundred feet, and Lawrence would lock the gyroscopes \u2014 at which point the aircraft would fly itself, hands-off, for as long as fuel and patience permitted. The device worked. The problem was that nobody believed it.<\/p><p>So the Sperrys took it on the road. They demonstrated the device at private trials for the U.S. Army Signal Corps in 1913. Then, in the winter of 1913\u20131914, the French Aero-Club announced a competition for safety devices in aviation, with a grand prize of 50,000 francs (approximately $10,000 \u2014 a fortune at the time). The Sperrys shipped a Curtiss C-2 to Le Havre, fitted it with the autopilot, and arranged a public demonstration over the Seine on the day of the competition.<\/p>\n\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px\"><img data-opt-id=1454729883  fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/6\/69\/Curtiss_Flying_Boat.jpg?utm_source=commons.wikimedia.org&utm_campaign=imageinfo&utm_content=thumbnail_unscaled\" alt=\"Curtiss Flying Boat\" 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\">A contemporary Curtiss flying boat \u2014 the same family of aircraft on which Sperry developed his original autopilot. Photo: Wikimedia Commons<\/figcaption><\/figure>\n\n<h2 style=\"padding-top:22px\">The Seine demonstration<\/h2><p>On 18 June 1914, with \u00c9mile Cachin in the rear cockpit and thousands of Parisians along the river, Lawrence Sperry made his run. The first pass at 50 feet, both hands on the controls, was unremarkable. The second pass, Lawrence let go of the controls and stood up in the cockpit, waving at the crowd, while the aircraft flew level on autopilot. The third pass, Cachin climbed out of his cockpit, walked along the lower wing, and stood on the wingtip \u2014 deliberately introducing a massive asymmetric weight load that should have rolled the aircraft inverted. The autopilot compensated by deflecting the opposite aileron, and the aircraft kept flying straight.<\/p><p>The jury awarded the Concours de la S\u00e9curit\u00e9 grand prize to Sperry and Cachin unanimously. The first international press headlines used the word \"automatic pilot\" \u2014 autopilot \u2014 for what they had seen. The First World War broke out six weeks later, and the autopilot disappeared into military development for the next decade. But the technology of every modern airliner traces back, directly, to that summer morning on the Seine.<\/p>\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;display:flex;gap:20px;align-items:flex-start\"><a href=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/9\/9c\/Smithsonian_logo.svg\/200px-Smithsonian_logo.svg.png\" target=\"_blank\" style=\"flex-shrink:0\"><img data-opt-id=1944917457  data-opt-src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/9\/9c\/Smithsonian_logo.svg\/200px-Smithsonian_logo.svg.png\"  decoding=\"async\" src=\"data:image/svg+xml,%3Csvg%20viewBox%3D%220%200%20100%%20100%%22%20width%3D%22100%%22%20height%3D%22100%%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Crect%20width%3D%22100%%22%20height%3D%22100%%22%20fill%3D%22transparent%22%2F%3E%3C%2Fsvg%3E\" alt=\"Smithsonian Institution\" style=\"width:96px;height:96px;border-radius:50%;object-fit:cover;object-position:center;display:block;border:2px solid #ddd\"><\/a><div><em>In a single decade Lawrence Sperry filed some two dozen aircraft-related patents \u2014 including the original three-axis autopilot, the turn-and-bank indicator, and an early retractable landing gear \u2014 before his death at thirty-one. Few careers in aviation have packed so much into so few years.<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>Lawrence Sperry&rsquo;s legacy<\/strong> &mdash; as recorded in aviation histories and patent records<\/div><\/div><\/div>\n\n<h2 style=\"padding-top:22px\">The other thing Sperry invented<\/h2><p>There is a single durable rumour about Lawrence Sperry that the engineering histories are reluctant to discuss. On 25 November 1916, his Curtiss flying-boat crashed into the Great South Bay off Long Island. He survived. His female passenger \u2014 a married Manhattan socialite named Mrs Waldo Polk \u2014 also survived. According to the story as it has been retold ever since, both were found naked in the wreckage \u2014 and the aircraft had been on autopilot. Sperry was widely credited with the practical invention of what would become known, much later, as the Mile-High Club. The aviation history community has spent a century arguing over whether the story is true. No fully verifiable contemporary account survives.<\/p><p>Sperry himself never confirmed the story. He died on 13 December 1923, ditching his Sperry Messenger in the English Channel during a flight from London to Brussels. His body was recovered weeks later. He was thirty-one years old. By the time of his death, every Allied military aviation agency had adopted variants of the Sperry stabiliser. By the early 1930s, no commercial passenger aircraft in production lacked one. From the 1980s onward, every fly-by-wire airliner in the world is, at its core, an industrial-scale evolution of what an American teenager built in his father's Brooklyn factory.<\/p><p><em>Sources: Smithsonian National Air and Space Museum, Sperry Gyroscope Company archives (Hagley Museum), HistoryNet, Simple Flying.<\/em><\/p>\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>Who invented the autopilot?<\/summary><div class=\"mf-faq-answer\"><p>Lawrence Burst Sperry, a young American aviator and engineer, invented the first practical aircraft autopilot. He publicly demonstrated his three-axis gyroscopic stabiliser on 18 June 1914 near Paris, just over ten years after the Wright brothers' first powered flight.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>How did Sperry demonstrate his autopilot in 1914?<\/summary><div class=\"mf-faq-answer\"><p>On 18 June 1914, Sperry flew a Curtiss biplane low over the Seine, then stood up and raised both hands while his mechanic climbed onto the wing, and the aircraft kept flying straight and level on its own. The stunt won the 50,000-franc Concours de la S\u00e9curit\u00e9 safety prize.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>How does a gyroscopic autopilot work?<\/summary><div class=\"mf-faq-answer\"><p>Sperry's autopilot used spinning gyroscopes to sense the aircraft's attitude across three axes. When the plane drifted from level flight, the system automatically moved the controls to correct it, holding a steady heading and altitude without the pilot touching the controls.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>How old was Lawrence Sperry when he invented the autopilot?<\/summary><div class=\"mf-faq-answer\"><p>Sperry was 21 years old when he demonstrated his autopilot in 1914. A prodigy, he had taught himself to fly by age fifteen, earned his pilot's certificate by eighteen, and was working as an engineer at his father's company by twenty.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>Who was Lawrence Sperry's father?<\/summary><div class=\"mf-faq-answer\"><p>Lawrence Sperry was the son of Elmer Ambrose Sperry, inventor of the marine gyrocompass and founder of the Sperry Gyroscope Company in 1910. The elder Sperry was a foundational figure in American precision engineering, and the company led the world in gyroscope-based stabilisation.<\/p><\/div><\/details><details class=\"mf-faq-item\"><summary>When did Sperry patent the autopilot?<\/summary><div class=\"mf-faq-answer\"><p>Sperry filed for his autopilot patent in 1916, and U.S. Patent 1,415,003, \"Automatic Pilot for Aeroplanes,\" was granted in 1922. He held 23 aircraft-related patents by the time of his death at age 31 in 1923.<\/p><\/div><\/details><\/div>\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Who invented the autopilot?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Lawrence Burst Sperry, a young American aviator and engineer, invented the first practical aircraft autopilot. 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He had just demonstrated the world&#8217;s first practical autopilot.<\/p>","protected":false},"author":27,"featured_media":980778,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"editor_notices":[],"footnotes":""},"categories":[666,664],"tags":[],"class_list":["post-980776","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 v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Lawrence Sperry: The Teenager Who Invented Autopilot in 1914<\/title>\n<meta name=\"description\" content=\"In 1914, 21-year-old Lawrence Sperry demonstrated the world&#039;s first autopilot by flying a biplane down the Seine with both hands in the air and his mechanic on the wing.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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