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Lockheed Model 10 Electra
The Lockheed Model 10 Electra was a twin-engine, all-metal monoplane airliner developed by the Lockheed Aircraft Corporation in the 1930s to compete with the Boeing 247 and Douglas DC-2. The type gained considerable fame as one was flown by Amelia Earhart on her ill-fated around-the-world expedition in 1937.
==Design and development==
Some of Lockheed's wooden designs, such as the Orion, had been built by Detroit Aircraft Corporation with metal fuselages. However, the Electra was Lockheed's first all-metal and twin-engine design by Lloyd Stearman〔(【引用サイトリンク】url=http://www.nationalaviation.org/stearman-lloyd/ )〕 and Hall Hibbard. The name Electra came from a star in the Pleiades. The prototype made its first flight on February 23, 1934 with Marshall Headle at the controls.〔Gunston 1998, p. 8.〕
Wind tunnel work on the Electra was undertaken at the University of Michigan. Much of the work was performed by a student assistant, Clarence Johnson. He suggested two changes be made to the design: changing the single tail to double tails (later a Lockheed trademark), and deleting oversized wing fillets. Both of these suggestions were incorporated into production aircraft. Upon receiving his master's degree, Johnson joined Lockheed as a regular employee, ultimately leading the Skunk Works in developing advanced aircraft such as the Lockheed SR-71 Blackbird.
The Lockheed Electra was one of the first commercial passenger aircraft to come equipped with mudguards as standard equipment. Before the Electra, only aircraft with fixed landing gear had mudguards.〔("Mud Guards on Plane Wheels Protect Landing Gear." ) ''Popular Mechanics'', April 1935, p. 523, (bottom-right).〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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