Tags: Aircraft.

The Lockheed Model 8 Sirius was a single-engined propeller-driven monoplane designed and built by Jack Northrop and Gerard Vultee while they were engineers at Lockheed in 1929 at the request of Charles Lindbergh. Two versions of the same basic design were built for the United States Air Force one made largely of wood with a fixed landing gear and one with a metal skin and retractable landing gear designated Y1C-25 and Y1C-23 respectively.

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