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The 1963 BAC One-Eleven test crash was a fatal accident of a British Aircraft Corporation aircraft on 22 October 1963, near Chicklade in Wiltshire, England. ==Accident== The accident occurred during a test-flight of a BAC One-Eleven (registration G-ASHG) which had taken off from Wisley Airfield with seven crew on board, piloted by Mike Lithgow. The BAC One-Eleven was on its fifth test flight to assess stability and handling characteristics during the approach to and recovery from a stall with the centre of gravity in varying positions. From an altitude of with 8° of flaps, the plane entered a stable stall with the aircraft descending at a high rate of descent in a horizontal attitude, eventually striking the ground with very little forward speed. The aircraft broke up and caught fire, killing all seven crew on board at Cratt Hill, near Chicklade, a small village in southern Wiltshire, adjacent to the A303. The plane was on its fifth stalling test of the day, and the crash occurred 23 minutes after takeoff from Wisley. The crew were Lt. Cdr. M J Lithgow OBE, Chief Test Pilot; Capt. R Rymer (Test Pilot); B J Prior (Aerodynamist); C J Webb (Designer); R A F Wright (Senior Observer); G R Poulter (Observer) and D J Clarke (Observer). ==Cause== The cause of the accident was the aircraft entering a stable stalled condition, recovery from which was impossible due to the wings blocking the airflow from the elevators on the tail. This was the first accident to be attributed to the phenomenon known as deep stall, peculiar to rear engine T-tailed aircraft.〔''Report on the Accident to B.A.C. One-Eleven G-ASHG at Cratt Hill, near Chicklade, Wiltshire on 22nd October 1963'', Ministry of Aviation C.A.P. 219, 1965〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「1963 BAC One-Eleven test crash」の詳細全文を読む スポンサード リンク
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