What is Helicopter rotor?
[[Image:Heli tail rotor dia.png|thumb|Helicopter rotors]] A '''rotor''' is the rotating part of a [[helicopter]] which generates [[lift (force)|lift]], either vertically in the case of a main rotor, or horizontally in the case of a tail rotor. == History and development == Before the development of powered helicopters in the mid 20th century, [[autogyro]] pioneer ''Juan de la Cierva'' researched and developed many of the basics of the rotor. Cierva is credited with successful development of multi-[[blade]]d, fully articulated rotor systems. This type of system is widely used today in many multi-bladed helicopters. == Other websites == {{Commonscat|Helicopter rotors}} * [http://www.aerodyndesign.com/ANALYSIS/ANALYSIS.htm Rotor Analysis - Blade Element Momentum Theory] * [http://www.b-domke.de/AviationImages/Rotorhead.html Helicopter Rotorhead Close-up Image Gallery] [[Category:Helicopters]]