GB556825A - Improvements in adjustable propellers for aircraft - Google Patents

Improvements in adjustable propellers for aircraft

Info

Publication number
GB556825A
GB556825A GB7032/42A GB703242A GB556825A GB 556825 A GB556825 A GB 556825A GB 7032/42 A GB7032/42 A GB 7032/42A GB 703242 A GB703242 A GB 703242A GB 556825 A GB556825 A GB 556825A
Authority
GB
United Kingdom
Prior art keywords
planet
hub
wheels
propulsive force
gears
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
GB7032/42A
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.)
GOTTFRID OTTO ALEXANDER DAHLST
Original Assignee
GOTTFRID OTTO ALEXANDER DAHLST
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 GOTTFRID OTTO ALEXANDER DAHLST filed Critical GOTTFRID OTTO ALEXANDER DAHLST
Publication of GB556825A publication Critical patent/GB556825A/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
    • B64C11/36—Blade pitch-changing mechanisms mechanical non-automatic

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Retarders (AREA)

Abstract

556,825. Screw propellers. DAHLSTROM, G. O. A. May 22, 1942, No. 7032. Convention date Nov. 14, 1940. [Class 114] In a variable pitch propeller, the pitch is adjustable by hand and also automatically with variations in the propulsive force by the relative rotation, when moved axially, of two oppositely toothed helical gears 12, 17, which form the sun-wheels of an epicyclic train and mesh with planet-wheels 15, 18 mounted on a common axle. The gear 12 is fixed on the propeller-hub 5, which is splined on its shaft 6, so that it can slide axially against the pressure of a spring 9 under variations of the propulsive force. The gear 17 is carried by a sleeve 1, which is rotatable on the hub 5 and acts through bevel-gearing 4 to adjust the pitch of the blades. The planet-wheel 18 gears with a fixed toothed annulus 19, and the planet-wheel 15 with an annulus 16, which can be turned by means of a worm 25 and a motor controlled by the pilot. The axial movement of the gears 12, 17 with respect to the planet-wheels causes relative motion of the sleeve 1 and the hub 5. An indicator 35, having a piston 29 bearing against a part 32 of the hub, shows changes in the propulsive force. A second indicator, connected to the worm 25, shows the adjustment of the blades.
GB7032/42A 1940-11-14 1942-05-22 Improvements in adjustable propellers for aircraft Expired GB556825A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE556825X 1940-11-14

Publications (1)

Publication Number Publication Date
GB556825A true GB556825A (en) 1943-10-22

Family

ID=20311930

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7032/42A Expired GB556825A (en) 1940-11-14 1942-05-22 Improvements in adjustable propellers for aircraft

Country Status (1)

Country Link
GB (1) GB556825A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640552A (en) * 1946-06-08 1953-06-02 Curtiss Wright Corp Propeller pitch change mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640552A (en) * 1946-06-08 1953-06-02 Curtiss Wright Corp Propeller pitch change mechanism

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