Aviation dictionary. 2014.
rotor system types — There are three types of rotors: rigid, semirigid, and fully articulated. In a rigid rotor, the blades are free to change pitch but otherwise are made as rigid as possible. The blades of rigid rotor have no hinges that allow them to flap or drag … Aviation dictionary
Helicopter rotor — This article is about helicopter main rotor systems. For antitorque control, see tail rotor. Helicopter rotor The rotor head of a Sikorsky S 92 A helicopter main rotor or rotor system is a type of fan that is used to generate both the aerodynamic … Wikipedia
Helicopter — For other uses, see Helicopter (disambiguation). Helicopter An LAPD Bell 206 … Wikipedia
Transverse flow effect — is an aerodynamic effect encountered when the helicopter moves (typically forward) through the air.In a hover, the air above the rotor disk is being pulled down from above and is equally distributed around the rotor disk. The air is descending… … Wikipedia
Air & Space 18A — Infobox Aircraft name=Air Space 18A caption= type=Autogyro manufacturer=Air and Space Manufacturing, Inc. developer=Raymond E. Umbaugh designer=Gilbert Devore first flight=1964 introduced=1965 retired= status=Out of production primary user= more… … Wikipedia
ground resonance — A resonance that manifests itself as a violent rocking of the helicopter when it is on the ground. This phenomenon is most evident when the helicopter is on hard surfaces that do not absorb vibration. It is caused by the resonance between the… … Aviation dictionary
Ground resonance — Ground resonance, in fully articulated multi bladed helicopters, is a hazardous condition during touchdown or at other times when the helicopter is running while sitting on the ground. A series of shocks to the landing gear can pass through to… … Wikipedia
TH-55 Osage — Infobox Aircraft name = TH 55 Osage Hughes 269 caption = Hughes TH 55 Osage type=Light utility and trainer helicopter manufacturer= Hughes Helicopters designer= first flight= October 1956 introduced= retired= status= primary user= United States… … Wikipedia
Schweizer 300 — Infobox Aircraft name=Hughes/Schweizer 300 series caption=Schweizer 300CB type=Light utility and trainer helicopter manufacturer= Hughes Helicopters Schweizer Aircraft Corporation first flight= introduced= 1964 retired= status= In production… … Wikipedia
Piasecki H-21 — Infobox Aircraft name= H 21 Shawnee/Workhorse caption=USAF CH 21B at the National Museum of the United States Air Force. type=Cargo helicopter manufacturer= Piasecki Helicopter designer= first flight= introduced=1949 retired=1967 status= primary… … Wikipedia
