Helicopter flight controls blades collectively ("i.e.," all at the same time) and independent of their position. Therefore, if a collective input is made, all the blades change equally, and as a result, the helicopter increases or decreases its total lift derived from the rotor. In level flight this would cause a climb or descent, while with the helicopter pitched forward an increase in total lift would produce an acceleration together with a given amount of ascent. The collective pitch control in a Boeing CH-47 Chinook is called a "thrust control", but serves the same purpose, except that it controls two rotor systems, applying
Robinson Helicopter Company designed for light helicopters. Robinson Helicopter Company The Robinson Helicopter Company, based at Zamperini Field in Torrance, California, is a manufacturer of civil helicopters. 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 uses a turbine engine. The company was founded in 1973 by Frank Robinson, a former employee of Bell Helicopter and Hughes Helicopters. Since delivering its first helicopter in 1979, Robinson Helicopter has produced over 12,000 aircraft. Plans for production of the Robinson R66 were announced in March 2007. It is a five-seat helicopter