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Title: Drag operated rotor pitch adjustment system for gyroplanes

Abstract

This patent describes collective pitch control means for use on a rotor assembly of a gyroplane rotary wing aircraft, consisting of: a hub rotatable about a first axis of rotation for supporting rotor blades, blade mount means associated with each blade for supporting the blade on the hub, each blade mount means including means for changing the pitch of the associated blade including pinion means supported on the hub and rotatable with respect to the hub and means responsive to the rotation of the pinion means for changing the pitch of the blade in one direction when the pinion means is rotated in a first direction and for changing the pitch of the blade in the opposite direction when the pinion means is rotated in a second direction. First and second pinion engaging means support independent rotation about the first axis of rotation and each being in light frictional contact with the hub to induce rotation therewith. The first pinion engaging means engages and rotates all the pinion means in the first direction when rotating slower than the hub. The second pinion engaging means engages and rotates all the pinion means in the second direction when rotating slower than themore » hub, and drag means selectively engages the first and second pinion engaging means to slow the selected pinion engaging means relative to a rotating hub whereby operation of the drag means while the hub and associated blades and blade mount means are rotating will produce a simultaneous change in the pitch of all blades.« less

Inventors:
Publication Date:
OSTI Identifier:
5060268
Patent Number(s):
US 4726736
Assignee:
NOV; NOV-88-007099; EDB-88-102816
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 17 Sep 1985
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; ROTORS; CONTROL EQUIPMENT; OPERATION; AERODYNAMICS; AIRCRAFT; AIRFOILS; DRAG; GYROSCOPES; ORIENTATION; ROTATION; EQUIPMENT; FLUID MECHANICS; MECHANICS; MOTION; 320303* - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Equipment & Processes

Citation Formats

Breuner, G. Drag operated rotor pitch adjustment system for gyroplanes. United States: N. p., 1988. Web.
Breuner, G. Drag operated rotor pitch adjustment system for gyroplanes. United States.
Breuner, G. Tue . "Drag operated rotor pitch adjustment system for gyroplanes". United States.
@article{osti_5060268,
title = {Drag operated rotor pitch adjustment system for gyroplanes},
author = {Breuner, G},
abstractNote = {This patent describes collective pitch control means for use on a rotor assembly of a gyroplane rotary wing aircraft, consisting of: a hub rotatable about a first axis of rotation for supporting rotor blades, blade mount means associated with each blade for supporting the blade on the hub, each blade mount means including means for changing the pitch of the associated blade including pinion means supported on the hub and rotatable with respect to the hub and means responsive to the rotation of the pinion means for changing the pitch of the blade in one direction when the pinion means is rotated in a first direction and for changing the pitch of the blade in the opposite direction when the pinion means is rotated in a second direction. First and second pinion engaging means support independent rotation about the first axis of rotation and each being in light frictional contact with the hub to induce rotation therewith. The first pinion engaging means engages and rotates all the pinion means in the first direction when rotating slower than the hub. The second pinion engaging means engages and rotates all the pinion means in the second direction when rotating slower than the hub, and drag means selectively engages the first and second pinion engaging means to slow the selected pinion engaging means relative to a rotating hub whereby operation of the drag means while the hub and associated blades and blade mount means are rotating will produce a simultaneous change in the pitch of all blades.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {2}
}