Sikorsky S-60 Sikorsky S-60 The Sikorsky S-60 helicopter, a prototype "flying crane", was derived from the S-56 in 1958. Proving to be underpowered, the development of the S-60 led to the larger, turbine-engined Sikorsky CH-54 Tarhe military transport helicopter, and its civil S-64 Skycrane variant, which were already on the drawing board by the time the sole example of the S-60 crashed on 3 April 1961. In 1958, Sikorsky began designing the S-60 as a prototype "flying crane" helicopter. The S-60 utilized the transmission, rotor system and piston engines from the CH-37/S-56. The fuselage of the S-60 was a simple "pod-and-boom" design
Sikorsky S-35 Sikorsky S-35 The Sikorsky S-35 was an American twin-engined sesquiplane transport later modified to use three-engines. It was designed and built by the Sikorsky Manufacturing Company for an attempt by Rene Fonck on a non-stop Atlantic crossing for the Orteig Prize. It was destroyed in the attempt. The S-35 was designed as a twin-engined transport with a range. During 1926 Rene Fonck, a French First World War fighter ace, was looking for a multi-engine aircraft to enter a competition to be the first to fly non-stop from New York to Paris. The prize was $25,000, offered by Raymond Orteig. Fonck