This Day in Aviation History
February 12th, 1947
First flight of the Sikorsky S-52.
The Sikorsky S-52 was a utility helicopter developed by Sikorsky Aircraft in the late 1940s. It was used by the U.S. Navy, Marines, and Coast Guard. The S-52 was the first US helicopter with all-metal rotor blades. A two-seater, it was developed into the four-seat S-52-2. It was designated HO5S-1 by the U.S. Navy and Marine Corp; HO5S-1G by the Coast Guard; and YH-18A by the Army….
Wikipedia, Sikorsky S-52: http://gstv.us/1PpZQeN
Vimeo, Walkthrough: Sikorsky S-52: http://gstv.us/1PpZYuz
For further reading, please check out this article from the Sikorsky Archives website: http://gstv.us/1Pq05X4
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Photo from: http://gstv.us/1Pq0poV
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