Sikorsky CH-54 Tarhe
The Sikorsky CH-54 Tarhe is an American twin-engine heavy-lift helicopter designed by Sikorsky Aircraft for the United States Army. It is named after Tarhe, an 18th-century chief of the Wyandot Indian tribe whose nickname was "The Crane". The civil version is the S-64 Skycrane. Development. Initial work on the Sikorsky "sky-crane" helicopters began in 1958 with the piston-engined Sikorsky S-60. The first flight of the turboshaft-powered S-64 Skycrane was on 9 May 1962. The United States Army eventually purchased 105, designating them CH-54. Used in Vietnam for transport and downed-aircraft  retrieval, it was highly successful. , it holds the helicopter record for highest altitude in level flight at , set in 1971, and fastest climb to 3,000, 6,000, and 9,000 m (10,000, 20,000, and 30,000 ft). The Skycrane can hold its cargo up and tight against its center spine to lessen drag and eliminate the pendulum effect when flying forward, as well as winch vehicles up and down from a hovering position, so the helicopter can deploy loads while hovering. Due to budget cuts, the Heavy Lift Helicopter (HLH) program was canceled and the CH-54 was not upgraded with larger engines. The  Boeing CH-47 Chinook gradually supplemented it in combat and eventually replaced it in Regular Army aviation units, although CH-54 Skycranes remained in Army National Guard service until 1991. Today, Erickson Air-Crane of Central Point, Oregon, operates the largest fleet of S-64 helicopters in the world under the name Erickson S-64 Aircrane. These can be equipped with water-dropping equipment (some also have foam/gel capability) for firefighting duties worldwide. After obtaining the type certificate and manufacturing rights in 1992, Erickson remains the manufacturer. Surviving aircraft. A large number of surviving airframes exist in flyable condition as well as in  museum collections worldwide.