|Manufacturer||Stinson Aircraft Corporation|
|Maiden Flight||15 July 1940|
Contributor: C. Peter Chen
The Vigilant aircraft was designed in response to the 1938 United States Air Corps request for a new two-seat light observation aircraft design. The prototype aircraft, which took flight on 15 Jul 1940, was designated YO-49 during the evaluation period and O-49 upon acceptance. During the war, Vigilant aircraft operated as an artillery observation aircraft, towed gliders, and transported passengers and supplies. In Apr 1942, the US Army gave the O-49 Vigilant aircraft a new designation, L-1 Vigilant. They were made obsolete in 1942 upon the arrival of newer designs.
A small number of these aircraft were operated by the British Royal Air Force; they were designated Vigilant Mk I and Vigilant Mk II in British service.
During the design's production life, 324 examples were built.
L-1 Vigilant Timeline
|15 Jul 1940||The YO-49 Vigilant prototype aircraft took its first flight with pilot Al Schramm.|
|Machinery||One Lycoming R-680-9 radial piston engine rated at 295hp|
|Wing Area||30.60 m²|
|Weight, Empty||1,211 kg|
|Weight, Maximum||1,542 kg|
|Speed, Maximum||196 km/h|
|Service Ceiling||3,900 m|
|Range, Normal||451 km|
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