The Brantly 305 is an American five-seat light helicopter of the 1960s. It is an enlarged version of the Brantly B-2 which was produced by the Brantly Helicopter Corporation.
| Brantly 305 | |
|---|---|
| |
| Brantly 305 at Oxford Airport UK in 1966 | |
| Role | Light helicopter |
| National origin | United States of America |
| Manufacturer | Brantly Helicopter Corporation |
| First flight | January 1964 |
Design and development
editThe five-seater Model 305 helicopter is based on the smaller two-seat Brantly B-2 that was designed by Newby O. Brantly. The helicopter is powered by a Lycoming IVO-540 flat six piston engine.[1] The enlarged cabin has room for five passengers, two side-by-side forward-facing seats and a bench seat at the rear for three passengers.[1] The Model 305 first flew during January 1964 and FAA type approval was received 29 July 1965.[2] 45 were built during the mid 60's by Brantly and Brantly-Hynes produced an improved version in 1985 of which 4 were built. The Brantly 305 suffered from a ground resonance problems.[citation needed] Hynes developed a more powerful and streamline version in 1993, none were produced.[citation needed]
Specifications
editData from Jane's All The World's Aircraft 1976-77 [3]
General characteristics
- Crew: 1
- Capacity: 4 passengers
- Length: 32 ft 11 in (10.03 m) (overall length, rotors turning), 24 ft 5 in (7.44 m) (fuselage length)
- Height: 8 ft 0+1⁄8 in (2.442 m)
- Empty weight: 1,800 lb (816 kg)
- Max takeoff weight: 2,900 lb (1,315 kg)
- Fuel capacity: 43 US gal (36 imp gal; 160 L)
- Powerplant: 1 × Lycoming IVO-540-A1A air-cooled flat-six engine, 305 hp (227 kW)
- Main rotor diameter: 28 ft 8 in (8.74 m)
- Main rotor area: 35.8 sq ft (3.33 m2)
Performance
- Maximum speed: 120 mph (190 km/h, 100 kn) at sea level
- Cruise speed: 110 mph (180 km/h, 96 kn) at sea level
- Range: 220 mi (350 km, 190 nmi)
- Service ceiling: 12,000 ft (3,700 m)
- Rate of climb: 975 ft/min (4.95 m/s)
See also
editRelated development
References
edit- ^ a b Orbis 1985, p. 839
- ^ "Type Certificate Date Sheet H3SW - Brantly 305" (PDF). Federal Aviation Administration. 17 October 1990. Retrieved 2009-12-30.
- ^ Taylor 1976, pp. 252–253.
- Taylor, John W.R. Jane's All The World's Aircraft 1976-77. London:Jane's Yearbooks, 1976. ISBN 0-354-00538-3.
- The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985), 1985, Orbis Publishing.