GB397486A - Screw propellers - Google Patents

Screw propellers

Info

Publication number
GB397486A
GB397486A GB1734/32A GB173432A GB397486A GB 397486 A GB397486 A GB 397486A GB 1734/32 A GB1734/32 A GB 1734/32A GB 173432 A GB173432 A GB 173432A GB 397486 A GB397486 A GB 397486A
Authority
GB
United Kingdom
Prior art keywords
blades
pitch
hub
tends
pinion
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
GB1734/32A
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.)
Bendix Aviation Corp
Original Assignee
Bendix Aviation Corp
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 Bendix Aviation Corp filed Critical Bendix Aviation Corp
Publication of GB397486A publication Critical patent/GB397486A/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)
  • Transmission Devices (AREA)
  • Gears, Cams (AREA)

Abstract

397,486. Screw propellers. BENDIX AVIATION CORPORATION, 105, West Adams Street, Chicago, U.S.A. Jan. 20, 1932, No. 1734. Convention date, Jan. 27, 1931. [Class 114.] The pitch of the blades of a screw propeller is varied in accordance with the difference between the air thrust on the blades and the driving torque of the shaft. The blades 6 are rotatably mounted in the hub 9 by a split sleeve 19 gripped by a pinion 18 and mounted in bearings 21, 22. The hub is mounted upon helical rows of balls 10a provided in a block 10 fitted upon the splined shaft 7. Springs 23 are mounted between the hub 9 and a plate 17 rotatably mounted upon the block 10, the plate 17 also carrying rack bars 15 which engage the pinions 18. The driving torque tends to set the blades at a maximum pitch and the air thrust tends to reduce the pitch and the springs are adjusted so that the blades take up a position which is proportional to the difference of these two values. Weights 24 are pivoted to the hub and are formed with quadrants engaging the pinion 18 and the centrifugal force tends to increase the pitch to balance the torsion acting on the blades which tends to decrease the pitch.
GB1734/32A 1931-01-27 1932-01-20 Screw propellers Expired GB397486A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US397486XA 1931-01-27 1931-01-27

Publications (1)

Publication Number Publication Date
GB397486A true GB397486A (en) 1933-08-21

Family

ID=21907157

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1734/32A Expired GB397486A (en) 1931-01-27 1932-01-20 Screw propellers

Country Status (1)

Country Link
GB (1) GB397486A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107472514A (en) * 2017-09-20 2017-12-15 上海歌尔泰克机器人有限公司 Variable-pitch propeller and unmanned plane

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107472514A (en) * 2017-09-20 2017-12-15 上海歌尔泰克机器人有限公司 Variable-pitch propeller and unmanned plane
CN107472514B (en) * 2017-09-20 2024-03-08 上海歌尔泰克机器人有限公司 Variable pitch propeller and unmanned aerial vehicle

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