Sikorsky H-37B Mojave looks like it name "Tired Dude" seen here at the Pima Aerospace Museum, Tuscon AZ.
The CH-37 was one of the last heavy helicopters to use piston engines, which were larger, heavier and less powerful than the turboshafts subsequently employed. This accounted for the type's fairly short service life, all being withdrawn from service by the late 1960s, Two 1417kW Pratt & Whitney R-2800-50 Double Wasp engines (1566kW R-280054s on late production aircraft) were mounted on stub wings, and the nacelles also housed the main legs of the retractable landing gear,
Four CH-37Bs were deployed to Vietnam in 1963 to assist in the recovery of downed U.S. aircraft. They were very successful at this role, recovering over US$7.5 million worth of equipment, some of which was retrieved from behind enemy lines.
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