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1. WO1997026185 - SLOTTED CAM CONTROL SYSTEM

Publication Number WO/1997/026185
Publication Date 24.07.1997
International Application No. PCT/US1996/020790
International Filing Date 30.12.1996
Chapter 2 Demand Filed 25.07.1997
IPC
B64C 13/32 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
CAEROPLANES; HELICOPTERS
13Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers
24Transmitting means
26without power amplification or where power amplification is irrelevant
28mechanical
32using cam mechanisms
B64C 27/82 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
CAEROPLANES; HELICOPTERS
27Rotorcraft; Rotors peculiar thereto
82characterised by the provision of an auxiliary rotor or fluid-jet device for counter-balancing lifting-rotor torque or changing direction of rotorcraft
CPC
B64C 13/32
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
CAEROPLANES; HELICOPTERS
13Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers
24Transmitting means
26without power amplification or where power amplification is irrelevant
28mechanical
32using cam mechanisms
B64C 2027/8245
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
CAEROPLANES; HELICOPTERS
27Rotorcraft; Rotors peculiar thereto
82characterised by the provision of an auxiliary rotor or fluid-jet device for counter-balancing lifting rotor torque or changing direction of rotorcraft
8245using air jets
B64C 27/82
BPERFORMING OPERATIONS; TRANSPORTING
64AIRCRAFT; AVIATION; COSMONAUTICS
CAEROPLANES; HELICOPTERS
27Rotorcraft; Rotors peculiar thereto
82characterised by the provision of an auxiliary rotor or fluid-jet device for counter-balancing lifting rotor torque or changing direction of rotorcraft
Y10T 74/18992
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
74Machine element or mechanism
18Mechanical movements
18992Reciprocating to reciprocating
Applicants
  • MC DONNELL DOUGLAS CORPORATION [US]/[US]
Inventors
  • NYHUS, Daniel, A.
Agents
  • STOUT, Donald, E.
Priority Data
08/587,66617.01.1996US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SLOTTED CAM CONTROL SYSTEM
(FR) SYSTEME DE COMMANDE A CAME A FENTE
Abstract
(EN)
The present invention provides a slotted cam control system for controlling pitch angles of fan blades (75) of a relatively low-pressure-ratio fan (27) within a fuselage of a helicopter (11). A force-receiving arm (65) of a slotted cam control system receives left and right forces from corresponding left and right foot rudder pedals. An end of the force-receiving arm (65) fits into a V-shaped cam. Next, the end of the force-receiving arm (65) passes the fulcrum of the V-shaped slot (69) and passes along a second predetermined distance of the V-shaped slot (69) in order to increase the pitch angles of the fan blades (75) as the opening of the direct jet thruster (33) corresponding to the depressed foot rudder pedal. A force-applying arm (71) is connected to the end of the force-receiving arm (65) that moves within the V-shaped slot (69), and this force-applying arm (71) applies to each of the fan blades (75) to change the pitch angles.
(FR)
L'invention concerne un système de commande à came à fente pour commander les angles d'inclinaison des pales (75) d'un rotor (27) à rapport de pressions relativement faible, dans un fuselage d'hélicoptère (11). Un bras sollicité (65) d'un système de commande à came à fente reçoit des forces de la gauche et de la droite de la pédale de gouvernail correspondante, gauche et droite. Une extrémité du bras sollicité (65) vient s'installer dans une came en forme de V. Ensuite, l'extrémité du bras sollicité (65) passe par la pointe de la fente en forme de V (69) et effectue un mouvement sur une seconde distance prédéterminée de la fente en V (69) pour augmenter les angles d'inclinaison des pales (75) du rotor, en fonction de l'ouverture du propulseur à jet direct (33) correspondant à la pédale de gouvernail enfoncée. Un bras exerçant une force (71) est relié à l'extrémité du bras sollicité (65) qui se déplace dans la fente en forme de V (69), ce bras exerçant une force sur chacune des pales de rotor (75) pour changer les angles d'inclinaison.
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