GB254377A - Improvements in or relating to variable pitch propellers - Google Patents

Improvements in or relating to variable pitch propellers

Info

Publication number
GB254377A
GB254377A GB850925A GB850925A GB254377A GB 254377 A GB254377 A GB 254377A GB 850925 A GB850925 A GB 850925A GB 850925 A GB850925 A GB 850925A GB 254377 A GB254377 A GB 254377A
Authority
GB
United Kingdom
Prior art keywords
thrust
load
bearing
variable pitch
collar
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
GB850925A
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 GB850925A priority Critical patent/GB254377A/en
Publication of GB254377A publication Critical patent/GB254377A/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
    • B64C11/02—Hub construction
    • B64C11/04—Blade mountings
    • B64C11/06—Blade mountings for variable-pitch blades

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Support Of The Bearing (AREA)

Abstract

254,377. Bramson, M. L. March 30, 1925. Screw propellers.-In variable pitch propellers the centrifugal load on the blades is taken in two ways depending upon whether the rotational speed is above or below a predetermined value. Below this value it is taken by a ball thrust which renders it easy to alter the pitch, and above this by plain thrust which tends to hold the blade rigid against relative motion with the boss. The blade 3 is provided with a ball thrust race 4 acting through a spring 5 which presses on a collar 6 screwed to the boss spigot 2. At a predetermined speed, the load on the spring is compressed, and a radial movement of the thrust bearing 4, of about one-half to one-thousandth of an inch takes place, when the bearing contacts with the ring 7 and the load is conveyed by this plain bearing to the collar 6.
GB850925A 1925-03-30 1925-03-30 Improvements in or relating to variable pitch propellers Expired GB254377A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB850925A GB254377A (en) 1925-03-30 1925-03-30 Improvements in or relating to variable pitch propellers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB850925A GB254377A (en) 1925-03-30 1925-03-30 Improvements in or relating to variable pitch propellers

Publications (1)

Publication Number Publication Date
GB254377A true GB254377A (en) 1926-06-30

Family

ID=9853799

Family Applications (1)

Application Number Title Priority Date Filing Date
GB850925A Expired GB254377A (en) 1925-03-30 1925-03-30 Improvements in or relating to variable pitch propellers

Country Status (1)

Country Link
GB (1) GB254377A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1061263A1 (en) * 1999-06-14 2000-12-20 FBM-HUDSON ITALIANA S.p.A. Rotor with blades attached to a hub by bearings contained in a bush
US8623776B2 (en) 2008-02-26 2014-01-07 Corning Incorporated Silicate glasses having low seed concentration
CN107662704A (en) * 2017-10-23 2018-02-06 郑州方达电子技术有限公司 Depopulated helicopter main rotor propeller hub mechanism

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1061263A1 (en) * 1999-06-14 2000-12-20 FBM-HUDSON ITALIANA S.p.A. Rotor with blades attached to a hub by bearings contained in a bush
US8623776B2 (en) 2008-02-26 2014-01-07 Corning Incorporated Silicate glasses having low seed concentration
US9073779B2 (en) 2008-02-26 2015-07-07 Corning Incorporated Fining agents for silicate glasses
US10040715B2 (en) 2008-02-26 2018-08-07 Corning Incorporated Silicate glasses having low seed concentration
US10626042B2 (en) 2008-02-26 2020-04-21 Corning Incorporated Fining agents for silicate glasses
CN107662704A (en) * 2017-10-23 2018-02-06 郑州方达电子技术有限公司 Depopulated helicopter main rotor propeller hub mechanism
CN107662704B (en) * 2017-10-23 2023-11-03 河南方达空间信息技术有限公司 Unmanned helicopter main rotor hub mechanism

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