Early Helicopters - The Brantly 305

By Willie Bodenstein



The five-seat Brantly 305 produced by the Brantly Helicopter Corporation that had its first flight in January 1964 is an enlarged version of the company's
smaller two-seat B-2. 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.


Photo © RuthAS / commons.wikimedia.org

The helicopter is powered by a Lycoming IVO-540 flat six piston engine. 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.

Forty-five of the Lycoming IVO-540 flat six piston powered 305s were built during the mid-60's by Brantly and Brantly-Hynes produced an improved version in 1985 of which 4 were built.

General characteristics:
Crew: 2
Capacity: 3 passengers
Length: 24 ft 5 in (7.44 m )
Rotor diameter: 28 ft 8 in (8.74 m)
Height: 8 ft 0? in (2.44 m)
Disc area: 35.8 sq ft (3.33 m≤)
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)

History








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