Sikorsky H-19 Chickasaw

Sikorsky H-19 helicopter model. The Sikorsky H-19 Chickasaw was a multi-purpose helicopter used by the United States Army and United States Air Force. It was also license-built by Westland Aircraft as the Westland Whirlwind in the United Kingdom. United States Navy and United States Coast Guard models were designated HO4S, while those of the U.S. Marine Corps were designated HRS.