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Lockheed Model 18 Lodestar
The Lockheed Model 18 Lodestar is a passenger transport aircraft of the World War II era.
==Design and development==
Sales of the 10–14 passenger Lockheed Model 14 Super Electra, which first flew in 1937, had proved disappointing, despite the aircraft's excellent performance, as it was more expensive to operate than the larger Douglas DC-3, already in widespread use.〔Francillon 1982, p. 135.〕 In order to improve the type's economics, Lockheed decided to stretch the aircraft's fuselage by , allowing an extra two rows of seats to be fitted.〔Francillon 1982, pp. 185–186.〕
The prototype for the revised airliner, designated Model 18 by Lockheed, was converted from the fourth Model 14, one of a batch which had been returned to the manufacturer by Northwest Airlines after a series of crashes. The modified aircraft first flew in this form on September 21, 1939, another two prototypes being converted from Model 14s, with the first newly built Model 18 flying on February 2, 1940.〔Francillon 1982, pp. 139, 186.〕
A total of 625 Lodestars of all variants were built.
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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