Boeing 40A

The Boeing 40A was the first passenger aircraft built by the Boeing company. It was of a biplane configuration, and powered by an air-cooled Pratt & Whitney Wasp engine, which offered a 200 lb weight saving over an equivalent liquid cooled engine. The frame of the fuselage was constructed using welded steel tubing. The primary purpose of the aircraft was to carry mail, however 2 passengers could be accommodated in a small cabin.

Boeing Model 40A
Type	Mailplane
Manufacturer	Boeing
Maiden flight	1927-05-20
Introduced	1927-07-01
Number built	25

Specifications

General characteristics

• Crew: 1
• Capacity: 2
• Length: 33 ft 2 in (10.12 m)
• Wingspan: 44 ft 2 in (13.47 m)
• Height: 12 ft 3 in (3.73 m)
• Wing area: 547 sq ft (50.82 m²)
• Empty weight: 3,531 lb (1602 kg)
• Max takeoff weight: 6000 lb (2722 kg)
• Powerplant: 1× Pratt & Whitney Wasp , 420 hp (313 kW)

Performance

• Maximum speed: 128 mph (206 km/h)
• Cruise speed: 105 mph (169 km/h)
• Range: 650mi (1046 km)
• Service ceiling: 14,500 ft (4420 m)