Fairchild Hiller FH-1100

FH-1100
U.S. Army YOH-5A flight in 1963
General information
Type	Helicopter
Manufacturer	Fairchild Hiller
Status	Currently in use
Primary users	Okanagan Helicopters Royal Thai Police
Number built	253
History
Manufactured	1966-1973
Introduction date	1966
First flight	21 January 1963

The Fairchild Hiller FH-1100 is a single-engine turbine, single two-bladed rotor, light helicopter that was designed and produced by the American aircraft manufacturer Fairchild Hiller in the 1960s.

Originally designated as the Model 1100, it was produced as the company's design submission for the United States Army's Light Observation Helicopter (LOH) program. It was one of the three winning designs in May 1961, after which the military designation Hiller YOH-5 was assigned; the prototype performed its maiden flight on 21 January 1963. However, following extensive evaluations of the type, the Model 1100 did not receive a production contract after Hiller was underbid by the rival Hughes Tool Co. Aircraft Division's OH-6 Cayuse in 1965.

Shortly following the purchase of Hiller Aircraft by Fairchild Engine and Airplane Corporation during 1964, the company decided to focus its efforts on the Model 1100, which was marketed as the FH-1100, towards other opportunities, both on the civilian market and with international military air services. Quantity production of the FH-1100 came to an end in 1973; support for existing operators was maintained. Manufacturing was briefly restarted during the 1980s, but did not achieve large numbers. The type certificate is presently held by the FH1100 Manufacturing Corporation of Century, Florida.^[1]