Fairchild Hiller FH-1100

The Fairchild Hiller FH-1100 is a single-engine turbine light helicopter with a single two-bladed rotor, designed and produced in the 1960s by the American manufacturer Fairchild Hiller. It began as the Hiller Model 1100 entry in the United States Army Light Observation Helicopter competition, one of three winning designs in May 1961, given the designation YOH-5, and first flown on 21 January 1963. Hiller was underbid by the Hughes OH-6 Cayuse in 1965 and received no Army production contract, so Fairchild Hiller, which had bought Hiller in 1964, marketed it as the FH-1100 to civil and foreign military customers. It is powered by a single Allison Model 250-C18 turboshaft engine and has skid landing gear. Quantity production ended in 1973, and the type certificate is held today by the FH1100 Manufacturing Corporation of Century, Florida.