rigid rotor


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rigid rotor

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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.
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.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
To investigate the appearance of staggering effects in the [gamma]-transition energies of our selected SDRB's, for each band, the deviation of the [gamma]-transition energies [E.sub.[gamma]](I) from a smooth reference (rigid rotor) was determined by calculating fourth-derivatives of [E.sub.[gamma]](I) ([d.sup.4][E.sub.[gamma]]/d[I.sup.4]) at a given spin I by using the finite difference approximation.
However, in the particular case of molecular hydrogen and deuterium gas, one can perform this calculation in the rigid rotor approximation.
Inayat-Hussain [21] studied the nonlinear dynamics of a magnetically supported rigid rotor in auxiliary bearings.
It was found that the pump-turbine analysed in this workbehaves as a rigid rotor; therefore it was concluded that the amplitudes of vibrations of first harmonics of blade passing frequency were not significantly affected by rotor response.
In the rigid rotor, the energies of the yrast states are:
Or rather sans chatter, as the A-160 T Hummingbird features a fully rigid rotor. Literally three days before Eurosatory, the author was able to see an A-160 Hummingbird in the flesh at the firm's Phantom Works in Victorville in California.
Russo, "Non-linear stability analysis of a rigid rotor on tilting pad journal bearings," Tribology International, vol.
General equation of the rigid rotor vibration dynamics can be given in the form
The German company decided to use plastics, fibres and foam fillers to manufacture the blades because it realised that their inherent flexibility was sufficient enough to take the strain of the flapping and lead-lag motion which allowed a rigid rotor design to be adopted.
In Section 2, a mathematical model of steady state behavior of the center of a rigid rotor supported by hydrodynamic journal bearing has been developed.