The true ancestor of modern airliners, with all-metal structure, cantilever low wings and retractable landing gear, was the Boeing Model 247, the prototype of which was flown on 8 February 1933. A total of 75 was built. The major production version was the Model 247D, powered by two 550 hp Pratt St Whitney Wasp engines driving controllable-pitch propellers. Cruising speed with ten passengers and 400 lb (181 kg) of mail was 180 mph (304 km/h).
Computer-Aided Design/ Drafting (CAD) model airplane plans in DWG or DXF format. Plans may vary greatly in detail and quality. Some are quite clear and complete others perhaps less useful for your needs. View full description for more details; R/C, display etc. ALL FREE to promote the great hobby of aviation.
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