GB557907A - Hydraulic pitch control mechanisms for propellers - Google Patents

Hydraulic pitch control mechanisms for propellers

Info

Publication number
GB557907A
GB557907A GB1607341A GB1607341A GB557907A GB 557907 A GB557907 A GB 557907A GB 1607341 A GB1607341 A GB 1607341A GB 1607341 A GB1607341 A GB 1607341A GB 557907 A GB557907 A GB 557907A
Authority
GB
United Kingdom
Prior art keywords
motor
driven
engine
speed
pump
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
GB1607341A
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 GB1607341A priority Critical patent/GB557907A/en
Publication of GB557907A publication Critical patent/GB557907A/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
    • B64C11/38—Blade pitch-changing mechanisms fluid, e.g. hydraulic
    • B64C11/42—Blade pitch-changing mechanisms fluid, e.g. hydraulic non-automatic

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

557,907. Variable-pitch propellers. HOOVER, W. S. Dec. 12, 1941, No. 16073. [Class 114] In a variable pitch propeller mechanism in which differential gearing for adjusting the blades is actuated by a fluid pressure motor driven by a fluid pressure pump under the control of an engine driven governor, means independent of the pump are provided for supplying pressure fluid to the motor to drive it in either direction for feathering and unfeathering while the engine is at rest. The blades 11, 12, Fig. 1, are connected by bevel gears 14, 15 to a bevel gear 16 having a spur gear 20 meshing with planet gears 19 which are carried by the hub 10 and mesh with a gear 21 driven by gears 22, 23, 24 from a gear 25 driven by the fluid pressure motor 36, Fig. 2. This motor is normally driven by a pump 28, which may be driven by the propeller engine or by a separate electric motor 29, and the speed of the motor 36 is such that no relative movement of the gears occurs. The return flow from the motor is controlled by a valve 46 operated by governor weights 49 so that variation of the speed of the engine results in change of speed of the motor 36 and consequent change of the pitch to restore the speed. As manual control 50 for the valve 46 is provided. To enable the motor 36 to be driven in either direction when the propeller engine is at rest, a pump 39 driven by an electric motor is provided and a valve 40 directs the flow to one side or other of the motor 36 as desired.
GB1607341A 1941-12-12 1941-12-12 Hydraulic pitch control mechanisms for propellers Expired GB557907A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1607341A GB557907A (en) 1941-12-12 1941-12-12 Hydraulic pitch control mechanisms for propellers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1607341A GB557907A (en) 1941-12-12 1941-12-12 Hydraulic pitch control mechanisms for propellers

Publications (1)

Publication Number Publication Date
GB557907A true GB557907A (en) 1943-12-10

Family

ID=10070657

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1607341A Expired GB557907A (en) 1941-12-12 1941-12-12 Hydraulic pitch control mechanisms for propellers

Country Status (1)

Country Link
GB (1) GB557907A (en)

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