File:Sikorsky S-55 inflight c.jpg

Summary
Description A U.S. Army Sikorsky UH-19D Chickasaw helicopter (s/n 56-1564) in flight. Date	Unknown date Source	U.S. Army photo from the official U.S. Department of the Army publication Vietnam Studies - Airmobility 1961-1971. Washington D.C. 1989 [1] photo [2] Author	U.S. Army https://en.wikipedia.org/wiki/File:Sikorsky_S-55_inflight_c.jpg