YO-51 Dragonfly file photo [15362]

YO-51 Dragonfly

CountryUnited States
ManufacturerRyan Aeronautical Company
Primary RolePrototype Aircraft


ww2dbaseIn response to the 1938 United States Army request for a new observation aircraft, the firm Ryan Aeronautical Company developed the YO-51 Dragonfly. Three prototypes were made and sold to the US Army for evaluation, and the first took flight in 1940. Ultimately, the US Army chose O-49 (later L-1) Vigilant aircraft made by Stinson Aircraft Corporation, and the YO-51 Dragonfly project was scratched.

ww2dbaseSource: Wikipedia


YO-51 Dragonfly
MachineryOne Pratt & Whitney R-985-21 Wasp Junior radial engine rated at 440hp
Span15.85 m
Length10.51 m
Weight, Empty1,908 kg
Speed, Maximum208 km/h
Speed, Cruising172 km/h


YO-51 Dragonfly prototype aircraft at rest, 1940YO-51 Dragonfly prototype aircraft on the ground, 1940YO-51 Dragonfly prototype aircraft preparing for takeoff, 1940YO-51 Dragonfly prototype aircraft taking off, 1940, photo 1 of 2
See all 5 photographs of YO-51 Dragonfly Prototype Aircraft

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YO-51 Dragonfly Prototype Aircraft Photo Gallery
YO-51 Dragonfly prototype aircraft at rest, 1940
See all 5 photographs of YO-51 Dragonfly Prototype Aircraft

Famous WW2 Quote
"The raising of that flag on Suribachi means a Marine Corps for the next 500 years."

James Forrestal, Secretary of the Navy, 23 Feb 1945