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Robinson R22 hovering. The R22 is a light, two-place, single reciprocating-engined helicopter, with a semirigid, two-bladed main rotor and a two-bladed tail rotor. The main rotor has a teetering hinge and two coning hinges. The tail rotor has only a teetering hinge. The normal production variant has skid landing gear.
A semi-rigid rotorhead does not have individual flapping or drag hinges but provides for flapping and lag motion through gimbal mounting. [3] A common example of a semi-rigid rotor is a teetering rotorhead found on the Robinson family of helicopters.
The Robinson Helicopter Company, based at Zamperini Field in Torrance, California, is an American helicopter manufacturer. As of 2024 [update] , Robinson produces three models: the two-seat R22 , the four-seat R44 , both of which use Lycoming piston engines , and the five-seat R66 , which use Rolls-Royce turbine engines .
Robinson R22 Beta II with Lycoming O-360-J2A engine. O-360-J2A 145 hp (108 kW) at 2700 rpm, Minimum fuel grade 91/96 avgas, compression ratio 8.50:1. Same as the C1C except has O-320-B2C prop flange bushings, lightweight cylinders and lower power rating for helicopter use. [1] [2] This engine is used in the Robinson R22 helicopter.
An O-320-B2C mounted in a Robinson R22 helicopter O-320-B2C 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100/130 or 91/96 avgas, compression ratio 8.50:1. Same as B2B but with retard breaker magnetos. [4] O-320-B2D 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 avgas, compression ratio 8.50:1.
The vertical speed indicator from a Robinson R22. This is the most common type used in aircraft , showing vertical speed in feet per minute (ft/min). Diaphragm Variometer operation
The most widespread model is the piston Robinson R44 with 5,600, then the H125/AS350 with 3,600 units, followed by the Bell 206 with 3,400. Most were in North America with 34.3% then in Europe with 28.0% followed by Asia-Pacific with 18.6%, Latin America with 11.6%, Africa with 5.3% and Middle East with 1.7%.
The Robinson R44 is a four-seat light helicopter produced by Robinson Helicopter Company since 1992. Derived from the company's two-seat Robinson R22 , the R44 features hydraulically assisted flight controls and a larger engine.