The Revolution Mini500 is a 1990s American singleseat light helicopter, designed and built by Revolution Helicopter Corporation as a kit for homebuilding.

https://www.ebay.co.uk/itm/Revolution...

http://www.redbackaviation.com/revolu...

General characteristics
Crew: 1
Length: 22 ft 6 in (6.9 m)
Main rotor diameter: 19 ft 0 in (5.79 m)
Width: 5 ft 3 in (1.6 m)
Height: 8 ft 1 in (2.5 m)
Empty weight: 330 lb (150 kg)
Gross weight: 820 lb (372 kg)
Powerplant: 1 × Rotax 582 piston engine, 64 hp (48 kW)
Performance

Maximum speed: 115 mph (186 km/h)
Cruise speed: 75 mph (122 km/h)
Range: 225 miles (361 km)
Endurance: 3 hours 0 min
Service ceiling: 10,000 ft (3,050 m)
Rate of climb: 1100 ft/min (5.6 m/s)