Britain KNIGHTED Him For His Engines — The Same Year His Own Company FIRED Him For Being RIGHT!

In 1942 the King knighted Roy Fedden for his work on British aero engines. The same year, the board of the Bristol Aeroplane Company, the company he had made rich, handed him notice of dismissal. Both letters were about the same engines. By the late 1920s every serious maker of aero engines built around poppet valves. Harry Ricardo argued for something cleaner: a thin steel sleeve sliding and turning between the piston and the cylinder, with ports cut through it. No springs, no pushrods, no rocker arms. Junkers tried it. So did Rolls-Royce. Each of them, in the end, gave up. The industry's verdict: a beautiful idea and a manufacturing nightmare. In 1926 Fedden decided Bristol would build sleeve valve engines anyway. Leonard Butler backed him. The Bristol board did not. It took fifteen years and millions of pounds. Every sleeve had to hold a tolerance of around one thousandth of an inch, and when the war came, engines that ran sweetly in the experimental shop were failing on the production line. The answer came in pieces: centrifugal casting, a low-expansion aluminium alloy for the cylinder, and a batch of sleeves that an operator finished slightly differently, almost by accident. In March 1944 Bristol's factories turned out 2,015 Hercules engines in a single month, for the Stirling, the Halifax, the Lancaster II, the Wellington and the Beaufighter, the aircraft British wartime journalism said Japanese soldiers called Whispering Death. By then Fedden was gone. A board of the founder's relatives, two brothers and two cousins with no engineer among them, had given him six months' notice in February 1942, and in September he left. On 17 November 1942 Lord Brabazon told the House of Lords what had happened. The company that let him go did not outlast his engines. This is the story of the Bristol sleeve valve, the man who staked his career on it, and how Britain thanked the finest engine designer it had in the war. CHAPTERS 00:00 Two Letters 03:19 The Valve That Ran the World 08:32 The Sugar Broker's Son 12:38 The Fifteen-Year Bet 19:54 The Batch That Came Out Right 27:32 The Cousins 33:56 The Man Outside the Gates If someone in your family built, serviced or flew behind a Bristol engine, tell their story in the comments. Those stories are part of this record. SOURCES AND CREDITS Archival photographs and film, all in the public domain or CC0: British official photographs of 1939–1945 (Royal Air Force and Ministry of Information photographers; Crown copyright expired), held by Imperial War Museums; U.S. National Archives (U.S. Air Force photographs, series 342-FH; U.S. Navy film 428-NPC-12834; Military Intelligence Division; Office of War Information poster 44-PF-53); Franklin D. Roosevelt Presidential Library; Library of Congress (Matson Collection; OWI); Universal Newsreel; Prelinger Archives; National Museum of Naval Aviation; Watertown Arsenal (U.S. Army); Smithsonian National Air and Space Museum (CC0); Nationaal Archief (Anefo, CC0); ETH-Bibliothek Zürich (CC0); Bibliothèque nationale de France (Agence Rol); Finnish Heritage Agency; Glasgow University Archive Services; Columbus Metropolitan Library; Clifton College archives; National Gallery of Ireland; Peterborough Museum. Period publications: The Autocar (1903), Illustrated London News (1919), Cosmos Engineering (1919), Bristol Aeroplane Company (1920), Svensk världsatlas (1930), Bulletin Walter (1938). Museum photographs of Bristol, Junkers and BMW engines released into the public domain or under CC0 by Hairyharry, Nimbus227, Adrian Pingstone, MisterBee1966 and Rottweiler on Wikimedia Commons. NACA Report No. 717 (1941) and War Department TM 1-405 Aircraft Engines (1941). Portrait of Lord Brabazon of Tara, 1935: Bassano Ltd. Thumbnail: Avro Lancaster B.II of No. 115 Squadron, 1943, Royal Air Force official photograph (IWM CH 19792). Technical drawings and animation: Design Under Fire. The appearance of U.S. Department of Defense (DoD) visual information does not imply or constitute DoD endorsement. #WW2 #AviationHistory #Documentary