The robinson r22 is a two-bladed, single-engine light utility helicopter manufactured by robinson helicopter company. The two-seat r22 was designed in 1973 by frank robinson and has been in production since 1979. General characteristics Crew: 1 Capacity: 2, including pilot Length: 28 ft 8 in (8.74 m) Rotor diameter: 25 ft 2.4 in (7.67 m) Tail rotor diameter: 3 ft 6 in (1.07 m) Height: 8 ft 11 in (2.72 m) Disc area: 497 (46.2 m) Empty weight: 880 lb (399 kg[23]) Loaded weight: 920 lb (417 kg) Max. Takeoff weight: 1, 370 lb (635 kg) Main tank total capacity: 19.8 us gallons (75 liters) Main tank usable capacity: 19.2 us gallons (73 liters) Optional aux tank total capacity: 10.9 us gallons (41 liters) Optional aux tank usable capacity: 10.5 us gallons (40 liters) Powerplant: 1 ã? lycoming o-320-a2b or -a2c flat 4 piston engine, 124 hp (93 kw) Performance Never exceed speed: 117 mph, 188 km/h, 102 kts Cruise speed: 110 mph, 177 km/h, 96 kts Range: 240 mi (386 km) Service ceiling: 14, 000 ft (4, 267 m) Rate of climb: 1, 200 ft/min (6.1 m/s) Disc loading: 2.61 lb/ (13.7 kg/m) Fuel consumption: 8~10 us gal/hr Power/mass: 0.095 hp/lb (0.147 kw/kg) Endurance: approx. 3 hours, with 30-minute reserve