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Helicopters with fly-by-wire systems allow a cyclic-style controller to be mounted to the side of the pilot seat. The cyclic is used to control the main rotor in order to change the helicopter's direction of movement. In a hover, the cyclic controls the movement of the helicopter forward, back, and laterally.
Cyclic/collective pitch mixing (CCPM) is a control concept employed in collective pitch radio-controlled helicopters. [1] CCPM reduces mechanical complexity and increases precision of control of the helicopter rotor's swashplate. Unlike conventional systems in which a single actuator is responsible for a single axis, CCPM mechanisms allow ...
These two effects, combined with any aft cyclic by the pilot attempting to keep the aircraft level, can cause the rotor blades to blow back and contact the tail boom, in some cases severing it. The tail rotor is geared to the main rotor, so in many helicopters the loss of main rotor RPM also causes a significant loss of tail rotor thrust and a ...
A backpack helicopter / helipack is a helicopter motor and rotor and controls assembly that can be strapped to a person's back, so they can walk about on the ground wearing it, and can use it to fly. It uses a harness like a parachute harness and should have a strap between the legs (so the pilot does not fall out of the harness during flight).
The cyclic control was found to be difficult to perfect, and led to Sikorsky locking the cyclic and adding two smaller vertical-axis lifting rotors to either side aft of the tailboom. [7] By varying pitch of these rotors simultaneously, fore and aft control was provided. Roll control was provided by differential pitching of the blades.
The Ellehammer helicopter was an otherwise-unnamed experimental aircraft built in Denmark in 1912. Based on experiments with models, Jacob Ellehammer constructed a full-size machine equipped with two contra-rotating discs, each of which was fitted with six vanes around its circumference.
A missing helicopter carrying five U.S. Marines has been found by civil authorities in Southern California, the U.S. Marine Corps announced Wednesday.
This is an accepted version of this page This is the latest accepted revision, reviewed on 29 December 2024. Military transport tiltrotor "V-22" redirects here. For other uses, see V22 (disambiguation). V-22 Osprey A MV-22 being used during a MAGTF demonstration during the 2014 Miramar Air Show General information Type Tiltrotor military transport aircraft National origin United States ...