GB452635A - Airscrew having an automatically variable pitch - Google Patents

Airscrew having an automatically variable pitch

Info

Publication number
GB452635A
GB452635A GB3916/36A GB391636A GB452635A GB 452635 A GB452635 A GB 452635A GB 3916/36 A GB3916/36 A GB 3916/36A GB 391636 A GB391636 A GB 391636A GB 452635 A GB452635 A GB 452635A
Authority
GB
United Kingdom
Prior art keywords
pitch
plate
bear
screw
feb
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3916/36A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
POUR L AVIAT SOC ET
Original Assignee
POUR L AVIAT SOC ET
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by POUR L AVIAT SOC ET filed Critical POUR L AVIAT SOC ET
Publication of GB452635A publication Critical patent/GB452635A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/30—Blade pitch-changing mechanisms
    • B64C11/32—Blade pitch-changing mechanisms mechanical
    • B64C11/34—Blade pitch-changing mechanisms mechanical automatic
    • B64C11/346—Blade pitch-changing mechanisms mechanical automatic actuated by the centrifugal force or the aerodynamic drag acting on auxiliary masses or surfaces

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Toys (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

452,635. Screw propellers. SOC. D'ETUDES POUR L'AVIATION, 23, Rue Marie-Debos, Montrouge, Seine, France. Feb. 8, 1936, No. 3916. Convention date, Feb. 9, 1935. [Class 114] A screw propeller wherein the pitch of the blades is automatically varied under centrifugal and torque forces by reason of the root being mounted in helical inclines on the hub is further provided with interposed levers which modifies the control due to the centrifugal force to provide a variable torque tending to move the air screw to the position of maximum pitch. The screw propeller blade roots are connected by links 3 to a sliding member 4 and abutting against it is a plate 18 that in turn is acted upon by rollers 17 forming part of a linkage pivoted at 14 and having outer centrifugal weights 16. The pivotal support is a plate 20 which is under axial spring restraint 22, 23. In the minimum pitch position the rollers 17 bear upon a curved portion 18<c> of the disc 18, and in the maximum pitch position they bear on the flat part 18<b>. The minimum pitch is adjustable by means of abutments 30 and the maximum pitch by the setting of the end 31 of the casing 9. The initial tension of the springs 22 and 23 can be modified by positioning the end nut 12. The springs bear against a plate 12b forming a race for balls 12<c>.
GB3916/36A 1935-02-09 1936-02-08 Airscrew having an automatically variable pitch Expired GB452635A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR452635X 1935-02-09

Publications (1)

Publication Number Publication Date
GB452635A true GB452635A (en) 1936-08-26

Family

ID=8900991

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3916/36A Expired GB452635A (en) 1935-02-09 1936-02-08 Airscrew having an automatically variable pitch

Country Status (1)

Country Link
GB (1) GB452635A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2492653A (en) * 1946-04-11 1949-12-27 Bendix Aviat Corp Air propeller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2492653A (en) * 1946-04-11 1949-12-27 Bendix Aviat Corp Air propeller

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