Hiller FH1100 / RH1100
The FH1100 originated from Hiller Aircraft Company’s entry for the US Army requirement of a Light Observation Helicopter (LOH). Designated OH-5A for the technical “fly-off’ it competed against Bell’s OH-4A (B206) and Hughes OH-6A (H369). Fairchild Stratos Corporation acquired Hiller in 1964 believing they were about to secure a large military contract as the OH-5A stood out the preferred winner. Leaked production data of the OH-5A resulted in Howard Hughes successfully under bidding with the OH-6A. The first FH1100, N81005, flew on 21 January 1963, powered by the Allison T63 turbine engine. Fairchild meanwhile announced they would begin civilian helicopter production of a refined OH-5A, designated the FH1100, offered for sale in June 1966 with either 4 or 5 seats. It became the first US civil turbine helicopter to go into production with a modest 246 units completed by 1971. A small number were produced between 1983 and 1985.
This utility helicopter has a semi-monocoque fuselage and conventional tail boom. The semi-rigid two-blade main rotor, able to be stored folded, is controlled by dual hydraulics, with the primary assisting cyclic and collective, the secondary pump actuating the cyclic only.
A prototype was constructed by Helicopter Technology Inc. in Century, Florida, in 2002 for the new FH1100 to go back into production as the FHoenix.
Under development in 1991 by Rogerson Hiller, the RH1100S features a lengthened and widened cabin and a LCD instrument display.
Engine: Allison 250-C18, 317 shp / 205 kW.
Vne: 110 kts.
Cruise: 95-100 kts.
MTOW: 1290 kg.
Useful load: 1335 lb / 605 kg
Range: 330 nm.
Length: 29 ft 9.5 in.
Rotor dia: 35 feet 4.75 in / 10.8 m
Ceiling: 14,000 ft.
Range: 348 miles.
Hook cap: 1500 lb.
Engine: Allison 250-C20.