Brantly 305
| 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 |
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.
Design and development
The 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. Hynes developed a more powerful and streamline version in 1993, none were produced.
Specifications
Data from Jane's All The World's Aircraft 1976-77 [3]
General characteristics
- Crew: 2
- Capacity: 3 passengers
- Length: 24 ft 5 in (7.44 m[4])
- Rotor diameter: 28 ft 8 in (8.74 m)
- Height: 8 ft 0⅛ in (2.44 m)
- Disc area: 35.8 sq ft (3.33 m²)
- Empty weight: 1,800 lb (817 kg)
- Max. takeoff weight: 2,900 lb (1,315 kg)
- Powerplant: 1 × Lycoming IVO-540-A1A air-cooled flat-six engine, 305 hp (227.5 kW)
Performance
- Maximum speed: 120 mph (104 knots, 193 km/h) at sea level
- Cruise speed: 110 mph (96 knots, 177 km/h) (75% power)
- Range: 220 miles (191 nmi, 354 km)
- Service ceiling: 12,000 ft (3,3660 m)
- Rate of climb: 975 ft/min (4.95 m/s)
See also
- Related development
References
- 1 2 Orbis 1985, p. 839
- ↑ "Type Certificate Date Sheet H3SW - Brantly 305" (PDF). Federal Aviation Authority. 17 October 1990. Retrieved 2009-12-30.
- ↑ Taylor 1976, pp. 252–253.
- ↑ Fuselage length
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Wikimedia Commons has media related to Brantly 305. |
- 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.