Robinson
R22
#

Photo: Robert Deering 1991
Alliance Airport
Fort Worth, Texas
   
Photo: Robert Deering 7/16/2014
American Helicopter Museum
West Chester, Pennsylvania
   
The Robinson R22 is a two-bladed, single-engine light utility helicopter manufactured by Robinson Helicopter. The two-seat R22 was designed in 1973 by Frank Robinson and has been in production since 1979.

Due to relatively low acquisition and operating costs, the R22 has been popular as a primary rotorcraft trainer around the world and as a livestock management tool on large ranches in North America and cattle stations in Australia. The R22 has a very low inertia rotor system and the control inputs are operated directly by push rods with no hydraulic assistance. Thus, the flight controls are very sensitive and require a light touch to avoid over correcting. A student that masters an R22 generally does not have a problem transitioning to a heavier helicopter. Due to the issues relating to a low inertia rotor-system and a teetering main rotor, operation by any pilot in the United States of the Robinson R-22 or R-44 requires a special endorsement by a certified flight instructor.  Tip weights were added to increase rotor inertia, but the small rotor limits weight.

General characteristics

  • Crew: 1
  • Length: 28 ft 8 in (8.7 m)
  • Rotor diameter: 25 ft 2 in (7.7 m)
  • Height: 8 ft 11 in (2.7 m)
  • Disc area: 497 ft (46.2 m)
  • Empty weight: 796 lb (389 kg)
  • Loaded weight: 920 lb (417 kg)
  • Max. takeoff weight: 1,370 lb (635 kg)
  • Powerplant: 1 Lycoming O-320-A2B or -A2C flat 4 piston engine, 124 hp (93 kW)
  • 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)

Performance

  • Never exceed speed: 117 mph, 189 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/ft (13.7 kg/m)
  • Power/mass: 0.095 hp/lb (0.147 kW/kg)
  • Endurance: approx. 2 hours, with 30-minute reserve

Source: Wikipedia