Airmaster H2-B1

H2-B1
Role	Two-seat ultralight helicopter
National origin	United Kingdom
Manufacturer	Airmaster Helicopters
First flight	12 September 1972
Number built	1

The Airmaster H2-B1 is a British two-seat ultralight helicopter built by Airmaster Helicopters of Camberley, Surrey.^[1]

Development

The H2-B1 was designed with the co-operation of the builders of the American Helicom helicopter.^[2] Construction of the prototype, registered G-AYNS, was started in September 1970 and it was first flown from Redhill Aerodrome on 12 September 1972.^[1]^[2] It was intended that an improved H2-B2 variant would enter production but only the prototype H2-B1 was built.^[1]

Design

The H2-B1 is a two-seat ultralight helicopter with a single two-bladed main rotor and a two-bladed tail rotor.^[1] The fuselage is a welded tubular structure skinned with aluminium and had two side-by-side configuration seats for the pilot and a passenger, it is also fitted with a skid landing gear, small wheels are fitted to allow the helicopter to be moved on the ground.^[1] The engine is a 100 hp (75 kW) Rolls-Royce Continental O-200-A air-cooled engine driving the main and tail rotors through a simple gearbox.^[1]

Variants

H2-B1: Prototype, one built^[1]
H2-B2: Proposed production variant with streamlined fuselage and a monocoque tailboom, not built.^[1]

Specifications

Data from Jane's All the World's Aircraft 1973-74^[1]

General characteristics

Crew: 2
Length: 7.70 m (25 ft 3 in)
Height: 2.46 m (8 ft 1 in)
Empty weight: 334 kg (738 lb)
Gross weight: 544 kg (1,200 lb)
Powerplant: 1 × Rolls-Royce Continental O-200-A four-cylinder, horizontally-opposed, air-cooled piston , 67 kW (100 hp)
Main rotor diameter: 7.01 m (23 ft 0 in)
Main rotor area: 104.0 m² (1,120 sq ft)

Performance

Maximum speed: 153 km/h (99.5 mph, 86.5 kn)
Cruise speed: 137 km/h (85 mph, 74 kn)
Range: 370 km (230 mi, 200 nmi)
Service ceiling: 3,050 m (10,000 ft)
Rate of climb: 9.1 m/s (1,800 ft/min)

References

Notes

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Taylor 1973, p. 190
^ ^a ^b Jackson 1973, p. 318

Bibliography

Jackson, A.J. (1973). British Civil Aircraft since 1919 Volume 2. London: Putnam. p. 382. ISBN 0-370-10010-7.
Taylor, John W.R. (1973). Jane's All the World's Aircraft 1973-74. London, United Kingdom: Jane's Yearbooks. ISBN 0-354-00117-5.

[Janes-1] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Taylor 1973, p. 190

[Jackson-2] Jackson 1973, p. 318

[1]

[2]