|National origin||United States|
|Primary user||US Navy|
|Developed from||Thomas-Morse MB-3|
Development and design
The MB-7 was built on the request of the US Navy. They had recently received the Thomas-Morse MB-3, and asked B Douglas Thomas to modify two of them to be racers. The first MB-7 was completed in 1921. It took part in the 1921 Pulitzer Trophy race, but during the race its fuel pump malfunctioned and it crashed and was destroyed by fire when a lighted match by a souvenir hunter which ignited the fuel. The second MB-7 was completed in January 1922. It first flew on 14 April 1922. It competed for the US Navy in the Pulitzer Trophy on 14 October 1922. Piloted by Captain Francis Pat Mulcahy it withdrew after 30 minutes with an overheating engine. It never flew again before being dismantled on 7 January 1925.
Data from Angelucci, 1987. p. 423.
- Crew: 1
- Length: 18 ft 6 in (5.63 m)
- Wingspan: 24 ft 0 in (7.31 m)
- Height: 7 ft 3 in (2.21 m)
- Wing area: 112 ft2 (10.42 m2)
- Empty weight: 1,423 lb (645 kg)
- Gross weight: 1,875 lb (850 kg)
- Powerplant: 1 × Wright H-2, 400 hp ( kW)
- Maximum speed: 181 mph (291 km/h)
- Angelucci, 1987. pp. 422-423.
- "The Thomas Morse M.B.-7 Monoplane" FLIGHT, December 29th 1921, bottom of page 862
- Angelucci, Enzo (1987). The American Fighter from 1917 to the present. New York: Orion Books. ISBN 0-517-56588-9.
Media related to Thomas-Morse MB-7 at Wikimedia Commons