Cessna CH-1 Skyhook

The Cessna CH-1 Skyhook is the only helicopter ever built by the Cessna Aircraft Company. The CH-1 had a single, two-bladed main rotor, and a front-mounted reciprocating engine which gave the aircraft a stable center of gravity (CG). Its semi-monocoque airframe greatly resembles its light airplane siblings built by Cessna. The CH-1 was named Skyhook for the civil market, similar to the marketing names used in the Cessna single engine airplane line, such as Skyhawk, Skylane and Skywagon.[2] The United States Army designated the CH-1C as the YH-41 Seneca. 

The CH-1 established many firsts. The CH-1A was the first helicopter to land on Pikes Peak, at an altitude of 14,110 feet on 15 September 1955, it had a higher cruise speed than comparable machines, and a CH-1B, modified with an FSO-526-2X engine, set an official FAI world altitude record for helicopters of 29,777 feet on December 28, 1957, while being piloted by Army Captain James E. Bowman. The previous record had been set by a turbine powered Aérospatiale Alouette II and was later broken by another Alouette II, but the record set by the CH-1B remains the highest altitude ever achieved by a piston-powered helicopter. The CH-1C was the first helicopter to receive IFR certification by the FAA.

Production was ended in December 1962. The company indicated that this was due to the civil aviation market not being ready for this type of aircraft, although CH-1 owner Rex Trailer claims that it was due to catastrophic transmission failures.