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engine in the fabric fuselage and two three-bladed rotors that rotated at 320 rpm and were fitted coaxially. The collective, cyclic, and differential controls were enclosed in the rotor hubs and ran in an oil-bath. Each rotor blade weighed 5.5 kilos. It also had a fixed wheel undercarriage with a
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6-cyl. air-cooled horizontally=opposed piston engine, 150 hp (110 kW)
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and constructed by the
Pennsylvania Elastic Company, Brantly's employer.
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Unfortunately, the design was too heavy and complex and was abandoned.
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78:was a 2-seat, coaxial-rotor helicopter designed by
236:Lambermont, Paul Marcel; Pirie, Anthony (1970).
94:prototype (NX69125), which used a 150 hp
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90:In 1946, Brantly started flight testing the
337:1940s United States civil utility aircraft
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240:(Illustrated, revised ed.). Barnes.
187:113 mph (182 km/h, 98 kn)
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193:400 mi (640 km, 350 nmi)
238:Helicopters and autogyros of the world
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7:
213:Airlife's Helicopters and Rotorcraft
138:17 ft 6 in (5.33 m)
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362:Single-engined piston helicopters
172:× 29 ft 6 in (9 m)
144:7 ft 9 in (2.36 m)
342:1940s United States helicopters
39:Brantly Helicopter Corporation
27:light coaxial-rotor helicopter
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211:Simpson, R.W. (26 May 1998).
99:tailwheel under the tailfin.
357:Aircraft first flown in 1946
156:2,000 lb (907 kg)
150:1,325 lb (601 kg)
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347:Coaxial rotor helicopters
255:Brantly Historical Photos
215:. The Crowood Press Ltd.
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117:General characteristics
86:Design and development
170:Main rotor diameter:
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80:Newby O. Brantly
49:Newby O. Brantly
29:Type of aircraft
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19:Brantly B-1
293:helicopters
178:Performance
160:Powerplant:
76:Brantly B-1
331:Categories
198:References
68:abandoned
130:Capacity:
111:Data from
45:Designer
299:Aircraft
291:Brantly
142:Height:
136:Length:
65:Status
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191:Range:
124:Crew:
24:Role
217:ISBN
162:1 ×
74:The
59:1946
316:305
311:B-2
306:B-1
92:B-1
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283:e
276:t
269:v
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132:1
126:1
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