The Boeing Model 40 was a single-engine biplane mail plane of the 1920s, built after the United States Post Office asked in 1925 for a replacement for its ex-military DH-4 aircraft. The first Model 40 used the Liberty V12 engine, but the production order went to the Douglas M-2. Boeing revived the design as the Model 40A, with an air-cooled Pratt and Whitney Wasp radial engine and a small enclosed cabin for two passengers, and won the San Francisco to Chicago airmail contract in 1927 with a bid of three dollars per pound. Later versions carried four passengers and used Hornet engines. It was the first Boeing aircraft to carry passengers, and production continued until February 1932.
Facts
Engine Class Comparison
Body StyleAircraft (no road body style) 1 Connections
Exemplifies
Source Boeing Model 40 (Wikipedia)
Of Make
Source Boeing Model 40 (Wikipedia)
Sources
1. Boeing Model 40 (Wikipedia)
Development and design, first flight
The Model 40 made its first flight on July 7, 1925.
Development and design, Wasp engine
Boeing revived the design for the tender, with the Model 40A replacing the Liberty engine with a 425 hp (317 kW) air-cooled Pratt & Whitney Wasp radial engine
Development and design, Wasp power
Boeing revived the design for the tender, with the Model 40A replacing the Liberty engine with a 425 hp (317 kW) air-cooled Pratt & Whitney Wasp radial engine
Development and design, production end
Production continued until February 1932.
Lead, manufacturer
It became the first aircraft built by the Boeing company to carry passengers.
Lead, origin
The Boeing Model 40 is a United States mail plane of the 1920s.
Lead, aircraft type
It became the first aircraft built by the Boeing company to carry passengers.
Of Make: Boeing, Lead, make
The Boeing Model 40 is a United States mail plane of the 1920s.
Exemplifies: Aviation, Lead, mode
The Boeing Model 40 is a United States mail plane of the 1920s.
In Group: Early Commercial Airliners and Transports, Lead, passengers
It became the first aircraft built by the Boeing company to carry passengers.
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