rigid rotor

A rotor head that allows the blades freedom to feather but not to flap or lead-lag. The rotor head has to absorb all the forces generated during flight maneuvers. Control loads in this type of rotor head are high; however, this type imparts the most control power to the helicopter during flight. Rigid rotor heads are expensive to manufacture and maintain because of the materials involved in their construction, but they are the only type of rotor system to give the aircraft some aerobatic capabilities.
In rigid rotor hubs, a gimbal-mounted control consisting of spoke-like fly weights is mounted on the same mast with the rotor. When the pilot deflects the stick, the force applied at A through the swash plate is felt at B, i.e., 90° in the direction of the rotation. This force displaces the rotor from parallel planes, individually changing the blade pitch through shafts from the control rotor blades to respective pitch horns on the main rotor blades. This tilts the rotor disc in the direction of pitch or roll indicated by the original control force.

Aviation dictionary. 2014.

Look at other dictionaries:

  • Rigid rotor — The rigid rotor is a mechanical model that is used to explain rotating systems. An arbitrary rigid rotor is a 3 dimensional rigid object, such as a top. To orient such an object in space three angles are required. A special rigid rotor is the… …   Wikipedia

  • 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

  • Rigid body — Classical mechanics Newton s Second Law History of classical mechanics  …   Wikipedia

  • Rigid body dynamics — Classical mechanics Newton s Second Law History of classical mechanics  …   Wikipedia

  • rigid — rigidity, rigidness, n. rigidly, adv. /rij id/, adj. 1. stiff or unyielding; not pliant or flexible; hard: a rigid strip of metal. 2. firmly fixed or set. 3. inflexible, strict, or severe: a rigid disciplinarian; rigid rules of social behavior. 4 …   Universalium

  • rigid — /ˈrɪdʒəd / (say rijuhd) adjective 1. stiff or unyielding; not pliant or flexible; hard. 2. firmly fixed, set, or not moving. 3. inflexible, strict, or severe: a rigid discipline; a rigid disciplinarian. 4. rigorously strict regarding opinion or… …   Australian English 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

  • semirigid rotor — A rotor system in which the blades are fixed to the hub, generally by a teetering or seesaw hinge, allowing the blades to flap and feather but not lead lag or drag. See also rotor system tubes. Two views of semi rigid rotor …   Aviation dictionary

  • Lockheed AH-56 Cheyenne — AH 56 Cheyenne AH 56 Cheyenne during testing Role At …   Wikipedia

  • Lockheed XH-51 — infobox Aircraft name = XH 51 type = Helicopter, compound helicopter manufacturer = Lockheed caption = XH 51A following its conversion into a compound rotorcraft testbed designer = first flight = 2 November 1962 introduced = retired = status =… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.