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Bureau of Standards developed photoelectric detector to simplify measurement of height of clouds.

Army Air Corps initiated development of radio-controlled aerial gliding torpedoes, gliding bombs, and aerial mines.

Classic National Advisory Committee for Aeronautics NACA report prepared by Robert R. Gilruth which provided basis for subsequent aircraft development ( National Advisory Committee for Aeronautics NACA Report No. 755, "Requirements for Satisfactory Flying Qualities of Airplanes").

National Advisory Committee for Aeronautics NACA established Special Committee on Jet Propulsion to review early British reports on the Whittle engine, which subsequently aided development of TG-100 turboprop engine by GE and the 19-B turbojet by Westinghouse. Dr. W. F. Durand was called out of retirement to head this committee.

Igor Sikorsky piloted a Vought-Sikorsky in the first officially recorded single-rotor helicopter flight longer than an hour in the Western Hemisphere; flying time, 1 hour 5 minutes 14.5 seconds; at Stratford, Conn.

Naval Aircraft Factory initiated development of a Glomb (glider bomb), to be towed long distances by powered aircraft and released over tar, get and guided by radio control and target-viewing television.

First official flight of British turbojet. Gloster E28/39 with Whittle WIX jet engine, at Cranwell England, flown by Flight Lt. Sayer for about 17 minutes. British De Havilland Mosquito equipped as night fighter (W4052) made its first flight with AI radar.

Army Corps Ferrying Command, forerunner of AAF's Air Transport Command, was created. By V-E Day it possessed 2,401 transports, of which 798 were 4 engined. Navy Engineering Experiment Station, Annapolis, Md., directed to undertake development of liquid-fuel rocket JATO for large flying boats.

Naval Powder Factory, Indian Head, developed and successfully tested 4.5-inch AA rocket.

Republic XP-47 Thunderbolt made first flight. May-June: First satisfactory spark plugs (ceramic insulated) for high-performance U.S. aircraft engines such as the P&W R-2800 were ordered in mass quantities. Plugs were developed under direction of T. T. Neill, Air Corps ignition engineer at Wright Field.

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