Boeing MB-3A

Boeing · United States · first flew 1919 · fighter

The MB-3A was a US open-cockpit biplane fighter, the Boeing-built development of the Thomas-Morse MB-3.

Recognition (WEFT)

W — WingsLow-mounted, straight
E — Engines1 × piston, nose-mounted
F — FuselageMB-3A has radiators on each side of the fuselage in line with the cockpit
T — TailConventional

WEFT is AircraftIQ's four-point recognition method — how it works.

Spot it by:

A SPAD-like two-bay biplane with a 300 hp Wright-built V-8 engine and fuselage-side radiators.

Specifications

Figures are for the representative variant described above; marks differ. See how AircraftIQ sources figures.

History

The Thomas-Morse MB-3 first flew on 21 February 1919. Boeing won the contract for 200 MB-3A on 21 April 1921 by underbidding Thomas-Morse, and the order helped rescue the company after wartime cancellations.

Variants

The MB-3A had a stronger structure and moved the radiator from the upper wing to the fuselage sides. Later it received larger tail surfaces. MB-3M was the training conversion.

Where you'll see it

It was the Air Service's mainstay fighter from 1922 to 1925 and served in Hawaii, the Philippines and the Panama Canal Zone. Replacement by the Curtiss PW-8 and Boeing PW-9 began from 1926.

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