GB517117A - Improvements in or relating to variable-pitch airscrews - Google Patents

Improvements in or relating to variable-pitch airscrews

Info

Publication number
GB517117A
GB517117A GB1094838A GB1094838A GB517117A GB 517117 A GB517117 A GB 517117A GB 1094838 A GB1094838 A GB 1094838A GB 1094838 A GB1094838 A GB 1094838A GB 517117 A GB517117 A GB 517117A
Authority
GB
United Kingdom
Prior art keywords
motor
switch
propeller
pitch
driven
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
GB1094838A
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.)
IVOR LUSTY
ROTOL AIRSCREWS Ltd
Original Assignee
IVOR LUSTY
ROTOL AIRSCREWS Ltd
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 IVOR LUSTY, ROTOL AIRSCREWS Ltd filed Critical IVOR LUSTY
Priority to GB1094838A priority Critical patent/GB517117A/en
Publication of GB517117A publication Critical patent/GB517117A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64CAEROPLANES; HELICOPTERS
    • B64C11/00Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/30Blade pitch-changing mechanisms
    • B64C11/44Blade pitch-changing mechanisms electric

Abstract

517,117. Screw propellers. ROTOL AIRSCREWS Ltd., and LUSTY, I. April 9, 1938, No. 10948. [Class 114] In a variable pitch propeller installation wherein a datum speed motor is employed, this motor controls means for rendering the pitch varying motor inoperative upon failure of the constant speed mechanism. A variable pitch propeller 12 utilises the pitch changing electric motor 13 driven off a battery 14 through lines 15 and either 16 or 17. A constant speed motor 32 driven at a regulated speed from the battery 14 drives generator 31 which in turn energizes a three-phase synchronizing alternating current electric motor 24. The motor 24 drives one pinion 23 of a differential, another pinion 22 of which is driven by the engine and the planet members 25 are used to drive a bevel wheel system 27, 28, 29, 30, the latter of which is used. as a switch member 19 The circuit for the motor 24 includes an on and off switch 20 and a main switch 34. When the switch 34 is on, the motor 24 is rotated and as long as the motor and engine speeds are alike, switch member 19 remains in a neutral position. When the engine speeds up or slows down, the switch 19 receives a motion and contacts with 35 or 36 whereby motor 13 increases or decreases the pitch accordingly. In the event of an electric breakdown, switch 20 opens and the motor 13 is deenergised and the propeller then runs as a fixed pitch propeller. When it is required to feather the propeller, the switch 34 is passed over to the other pair of contacts and motor 13 operates until the switch is opened again. In an alternative, instead of a rotary electric motor 24, a reciprocating ratchet type motor may be employed.
GB1094838A 1938-04-09 1938-04-09 Improvements in or relating to variable-pitch airscrews Expired GB517117A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1094838A GB517117A (en) 1938-04-09 1938-04-09 Improvements in or relating to variable-pitch airscrews

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1094838A GB517117A (en) 1938-04-09 1938-04-09 Improvements in or relating to variable-pitch airscrews

Publications (1)

Publication Number Publication Date
GB517117A true GB517117A (en) 1940-01-22

Family

ID=9977233

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1094838A Expired GB517117A (en) 1938-04-09 1938-04-09 Improvements in or relating to variable-pitch airscrews

Country Status (1)

Country Link
GB (1) GB517117A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455378A (en) * 1943-11-27 1948-12-07 Howard M Mccoy Mechanism and controls for controllable aircraft propellers; complete propeller with automatic controls
US2456747A (en) * 1944-03-23 1948-12-21 Avco Mfg Corp Speed governor
US2465358A (en) * 1943-10-04 1949-03-29 Kenneth L Curtis Engine synchronizer
US2593484A (en) * 1945-11-19 1952-04-22 La Verne R Philpott Automatic aircraft propeller synchronizer
US2738183A (en) * 1953-01-27 1956-03-13 Curtiss Wright Corp Speed control system
WO2016043942A3 (en) * 2014-08-28 2016-06-02 Sikorsky Aircraft Corporation Pitch control system
US10647422B2 (en) 2014-08-28 2020-05-12 Sikorsky Aircraft Corporation Pitch control system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465358A (en) * 1943-10-04 1949-03-29 Kenneth L Curtis Engine synchronizer
US2455378A (en) * 1943-11-27 1948-12-07 Howard M Mccoy Mechanism and controls for controllable aircraft propellers; complete propeller with automatic controls
US2456747A (en) * 1944-03-23 1948-12-21 Avco Mfg Corp Speed governor
US2593484A (en) * 1945-11-19 1952-04-22 La Verne R Philpott Automatic aircraft propeller synchronizer
US2738183A (en) * 1953-01-27 1956-03-13 Curtiss Wright Corp Speed control system
WO2016043942A3 (en) * 2014-08-28 2016-06-02 Sikorsky Aircraft Corporation Pitch control system
US10647422B2 (en) 2014-08-28 2020-05-12 Sikorsky Aircraft Corporation Pitch control system
US10676184B2 (en) 2014-08-28 2020-06-09 Sikorsky Aircraft Corporation Pitch control system for an aircraft
US10676185B2 (en) 2014-08-28 2020-06-09 Sikorsky Aircraft Corporation Rotary wing aircraft pitch control system

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