GB676257A - Improvements in or relating to variable pitch propeller construction - Google Patents
Improvements in or relating to variable pitch propeller constructionInfo
- 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
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.
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) |
-
1950
- 1950-03-21 GB GB6993/50A patent/GB676257A/en not_active Expired
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