The Adams-Wilson Hobbycopter (later named the Choppy) is a tiny single-seat open-framework helicopter designed for home-building, to be powered by a motorcycle engine. Plans were first marketed in 1958 and have been revised and revived by various designers many times over the years.
Specifications (Choppy, typical)
General Characteristics
- Crew: one pilot
- Length: 15 ft 0 in (4.57 m)
- Main rotor diameter: 21 ft 6 in (6.55 m)
- Height: 6 ft 0 in (1.83 m)
- Main rotor area: 363 ft² (34 m²)
- Empty: 300 lb (136 kg)
- Loaded: 600 lb (183 kg)
- Maximum takeoff: lb ( kg)
- Powerplant: various - typically a 2-stroke motorcycle engine
Performance
- Maximum speed: 85 mph (136 km/h)
- Range: miles ( km)
- Service ceiling: 8,500 ft (2,590 m)
- Rate of climb: 950 ft/min (290 m/min)
- Main rotor loading: 1.7 lb/ft² (5.3 kg/m²)
- Power/Mass: varies
Related content
Related development:
A-B Helicopters A/W 95 -
Ben Showers Skytwister
Comparable aircraft:
Designation sequence:
