GB676257A - Improvements in or relating to variable pitch propeller construction - Google Patents

Improvements in or relating to variable pitch propeller construction

Info

Publication number
GB676257A
GB676257A GB6993/50A GB699350A GB676257A GB 676257 A GB676257 A GB 676257A GB 6993/50 A GB6993/50 A GB 6993/50A GB 699350 A GB699350 A GB 699350A GB 676257 A GB676257 A GB 676257A
Authority
GB
United Kingdom
Prior art keywords
fluid
servomotor
controlled
shaft
cam
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
GB6993/50A
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.)
Raytheon Technologies Corp
Original Assignee
United Aircraft 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 United Aircraft Corp filed Critical United Aircraft Corp
Publication of GB676257A publication Critical patent/GB676257A/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)
  • Hydraulic Motors (AREA)

Abstract

676,257. Variable-pitch propellers. UNITED AIRCRAFT CORPORATION. March 21, 1950 [March 30, 1949], No. 6993/50. Class 114. Blade settings are varied by the vane motors 30, fluid for which is supplied by pumps 34 rotating with hub and engaging the cam 40 which is normally stationary. The fluid is controlled by valve 38, the position of which is controlled by the plate 58, whose axial position is determined by rotation of the member 130 and cam slot 134, the member being rotated about the shaft axis bv rack 108 under control of servomotor 80. Fluid for the servomotor is supplied by pump 96 and controlled by governor valve 92 to maintain constant speed. For feathering and reverse with shaft running the electric controlled valves 104, 144, 146 are operated to cut out the governor valve and direct fluid from pump 96 to the servomotor. For feathering the blades with the shaft stationary the cam 40 is rotated about the shaft by the motor 78, thus operating the pumps 34. Under these conditions auxiliary pump 158 supplies fluid to operate the servomotor. Specifications 560,522 and 670,412 are referred to.
GB6993/50A 1949-03-30 1950-03-21 Improvements in or relating to variable pitch propeller construction Expired GB676257A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US676257XA 1949-03-30 1949-03-30

Publications (1)

Publication Number Publication Date
GB676257A true GB676257A (en) 1952-07-23

Family

ID=22077275

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6993/50A Expired GB676257A (en) 1949-03-30 1950-03-21 Improvements in or relating to variable pitch propeller construction

Country Status (1)

Country Link
GB (1) GB676257A (en)

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