The CH-54 helicopter, is a twin. MILVIZ SIKORSKY S-64 SKYCRANE.OPERATION MANUAL Page 36 This products was developed by MILVIZ Military Visualizations and. Swordfall Kingdoms 2 here.

The idea of using the helicopter as a flying crane was already taken in consideration by the Germans during the Second World War, but the Americans were the first to develop this particular type of aircraft used to lift heavy loads. Among pioneers Kellett Aircraft Corporation certainly occupies one of the top spots. On May 2, 1947 this American company signed a contract with Air Material Command for the supply of a large heavy lift helicopter designated Kellett XR-17 to be used for short-range heavy duties teorethically capable of carrying suspended loads up to 10 tons.However construction and development of this experimental aircraft, which after the creation of the USAF in June 1948 received new designation of XH-17, was carried out by the Hughes Aircraft Company.

In the course of 1948 Howard Hughes took over the XH-17 project after serious financial problems encountered by Kellett. The Hughes XH-17 made its first flight in Culver City (California) on October 23, 1952 piloted by Gale Moore. At the time of its appaerance this helicopter, assembled using components from different aircraft in order to reduce development costs, was the largest in the world. It had in fact a maximum take-off weight of nearly 20 tons and a main rotor diameter of about 40 meters.

This was driven by two powerful turbines General Electric J35 (a true precursor for its time) that sent compressed air to nozzles at the ends of its blades. Cara Buat Windows 7 Palsu Jadi Asli here. Altogether the XH-17 made a dozen hours of test flights (which was in fact the planned service lifetime of the blades!). During a test flight this prototype lifted a suspendend load of 4'665 kg (10'284 lbs).

Because of the unsatisfactory results at the end of the test program the XH-17 was dismantled. The interest of Sikorsky After the appearance ot the XH-17 several other manufacturers including Aircraft Omega (Omega BS-12 1956), Mc Donnell (Model 120 1957), Westland (Westland Westminster 1958), or Mil (Mil MI-10 1960), began to show their interest in the concept of the 'aerial crane'.

Sikorsky also appears in the list of the pioneers. Already in 1955 Igor Sikorsky had spoken publicly about his interest in the development of an 'aerial crane.' Following his father’s instructions in 1957 his son Sergei made a sketch of a helicopter which was generally very similar to the S-64 Sky Crane. The following shall aim at describing the actual facts in the correct order to avoid confusion. In the early ‘50s Sikorsky began the construction in series of the model S-56, a large twin-engine helicopter developed on behalf of the Marines (military designation H-37 Mojave) mainly used as an assault and troop transport aircraft. It was in fact able to carry 26 equipped soldiers and was built in about 150 units. Birth of the Sikorsky S-60 Sikorsky’s basic idea was to develop a helicopter uniquely designed to carry all loads externally.