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GB673668A - Improvements in or relating to variable pitch screw propellers - Google Patents

Improvements in or relating to variable pitch screw propellers

Info

Publication number
GB673668A
GB673668A GB1173749A GB1173749A GB673668A GB 673668 A GB673668 A GB 673668A GB 1173749 A GB1173749 A GB 1173749A GB 1173749 A GB1173749 A GB 1173749A GB 673668 A GB673668 A GB 673668A
Authority
GB
United Kingdom
Prior art keywords
relating
variable pitch
pitch screw
screw propellers
weight
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
GB1173749A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1173749A priority Critical patent/GB673668A/en
Publication of GB673668A publication Critical patent/GB673668A/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)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

673,668. Variable-pitch propellers. ELMER, A. E. Aug. 3, 1950 [May 3, 1949], No. 11737/49. Class 114. The blade 19. is turned towards a coarse pitch position by the centrifugal force acting on a weight 26 attached to the blade root and acting against a coil spring 24. The weight is mounted so as to pivot on a rod 25 and has a shouldered portion 27 which turns to engage projections on the propeller hub. These projections correspond to coarse, fine and fully feathered pitches.
GB1173749A 1949-05-03 1949-05-03 Improvements in or relating to variable pitch screw propellers Expired GB673668A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1173749A GB673668A (en) 1949-05-03 1949-05-03 Improvements in or relating to variable pitch screw propellers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1173749A GB673668A (en) 1949-05-03 1949-05-03 Improvements in or relating to variable pitch screw propellers

Publications (1)

Publication Number Publication Date
GB673668A true GB673668A (en) 1952-06-11

Family

ID=9991750

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1173749A Expired GB673668A (en) 1949-05-03 1949-05-03 Improvements in or relating to variable pitch screw propellers

Country Status (1)

Country Link
GB (1) GB673668A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2404694A1 (en) * 1974-02-01 1975-08-07 Neuhierl Hermann Electric motor drive for toy aeroplane - has propeller with blade pitch varying in dependence on driving torque

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2404694A1 (en) * 1974-02-01 1975-08-07 Neuhierl Hermann Electric motor drive for toy aeroplane - has propeller with blade pitch varying in dependence on driving torque

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