Sikorsky UH-34D Seahorse

Beginning in 1962, the H-34 served as the primary Marine Corps assault helicopter of the Vietnam War until its replacement by the turbine-powered CH-46. It began in 1952 as a Navy anti-submarine warfare helicopter evolved from the Sikorsky S-55 series. Initially designated as the HSS-1, it went on to see significant service in the combat assault and utility roles with the Army and Marine Corps. Great Britain and France also deployed versions in some of the first helicopter combat assault operations.

A large payload capacity and generous center-of-gravity range made the H-34 series an effective transport helicopter for the 1950s.

The Marine Corps UH-34D never served overseas but wears the markings of Marine Medium Helicopter Squadron 163 that did see extensive combat in Vietnam.

The aircraft was on display at the Udvar-Hazy Center of the National Air and Space Museum until June, 2015.

Rotor Diameter: 56 ft.

Fuselage Length: 46 ft. 9 in.

Empty Weight: 7,900 lb.

Gross Weight: 13,000 lb.

Speed (Max): 123 mph

Powerplants: 1 Wright 1820-84, 9-cylinder, radial air-cooled

Horsepower: 1,525 hp engine

Acquisition Source: National Air and Space Museum gift