GB683906A - Improvements in or relating to control units of variable pitch propellers - Google Patents

Improvements in or relating to control units of variable pitch propellers

Info

Publication number
GB683906A
GB683906A GB6994/50A GB699450A GB683906A GB 683906 A GB683906 A GB 683906A GB 6994/50 A GB6994/50 A GB 6994/50A GB 699450 A GB699450 A GB 699450A GB 683906 A GB683906 A GB 683906A
Authority
GB
United Kingdom
Prior art keywords
pump
feathering
propeller
propeller shaft
reversing
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
GB6994/50A
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 GB683906A publication Critical patent/GB683906A/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)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

683,906. Variable-pitch propellers. UNITED AIRCRAFT CORPORATION. March 21, 1950. [March 30, 1949] No. 6994/50. Class 114. A control device is formed as a self contained unit which is placed over a sleeve on the propeller shaft and held against rotation. The unit comprises an oil reservoir 84, containing a main pump 116, a scavange pump 162, both driven by the gear 120 rotating with the propeller shaft, and an auxiliary pump 104, driven by the electric motor 82 for feathering when the propeller is stationary. The inlet 124 to the pump is closed by the collar 128 so that oil can be pumped up pipe 134 in inverted flight. For normal constant speed operation fluid is led under the control of the governor valve 100 to passages 88, 94 which lead through annular parts in the sleeve 14 secured to the propeller shaft. Feathering and reversing is initiated by the hand operated switch 192 which selectively controls the solenoid operated valves 146, 148 to override the governor valve. Fluid from these valves also loads the pump pressure relief valve 96, thus increasing the effective pump pressure. Motion of the propeller blades is limited during feathering or reversing by contact segments 328, 330 on the blades, these operating holding solenoids 324, 326 and 344. Specifications 636,402 and 683,888 are referred to.
GB6994/50A 1949-03-30 1950-03-21 Improvements in or relating to control units of variable pitch propellers Expired GB683906A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US683906XA 1949-03-30 1949-03-30

Publications (1)

Publication Number Publication Date
GB683906A true GB683906A (en) 1952-12-10

Family

ID=22082259

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6994/50A Expired GB683906A (en) 1949-03-30 1950-03-21 Improvements in or relating to control units of variable pitch propellers

Country Status (1)

Country Link
GB (1) GB683906A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2809702A (en) * 1954-04-14 1957-10-15 United Aircraft Corp Feathering override for variable pitch propeller
EP3705396A1 (en) * 2019-03-07 2020-09-09 General Electric Company Propeller speed overshoot preventing logic

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2809702A (en) * 1954-04-14 1957-10-15 United Aircraft Corp Feathering override for variable pitch propeller
EP3705396A1 (en) * 2019-03-07 2020-09-09 General Electric Company Propeller speed overshoot preventing logic
US11964750B2 (en) 2019-03-07 2024-04-23 General Electric Company Propeller speed overshoot preventing logic

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