First flight of the Lockheed CL-475
Wednesday, November 4, 1959 - Edwards AFB, United States of America
Description
The Lockheed CL-475 was a rigid rotor design based on the ideas of Lockheed engineer Irven Culver. The aircraft flew 5 months from initiation of the design following remote controlled model tests of the concept. It was the first helicopter to be built and flown by Lockheed. Source: "Rigid Rotor Rewind: Lockheed Helicopters Come Full Circle", Raymond L. Robb, VERTIFLITE March/April 2017, Page 50
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