GB494739A - Improvements in and relating to aircraft sustaining rotors - Google Patents

Improvements in and relating to aircraft sustaining rotors

Info

Publication number
GB494739A
GB494739A GB2866438A GB2866438A GB494739A GB 494739 A GB494739 A GB 494739A GB 2866438 A GB2866438 A GB 2866438A GB 2866438 A GB2866438 A GB 2866438A GB 494739 A GB494739 A GB 494739A
Authority
GB
United Kingdom
Prior art keywords
rings
blades
damper
disc
lagging
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
GB2866438A
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.)
Cierva Autogiro Co Ltd
Original Assignee
Cierva Autogiro Co Ltd
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 Cierva Autogiro Co Ltd filed Critical Cierva Autogiro Co Ltd
Priority to GB2866438A priority Critical patent/GB494739A/en
Publication of GB494739A publication Critical patent/GB494739A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/51—Damping of blade movements

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

494,739. Aircraft with rotary-wing systems. CIERVA AUTOGIRO CO., Ltd., and BENNETT, J. A. J. April 30, 1937, Nos.28664/38, (divided out of 494,427), and 30588/37. [Class 4] In rotary-wing aircraft in which the rotorblades are articulated to the hub for leading and lagging displacements, a central friction damper 45 is provided and comprises frictional elements connected to the several blades, the friction surfaces operative to damp unsymmetrical leading and lagging of the rotor-blades having a greater total contact area or are subjected to a greater pressure than the frictional surfaces, if any, operative to damp symmetrical leading and lagging motions of the blades. As shown, the damper is embodied in a rotor-head similar to that described in Specification 494,427. The damper comprises a bottom plate 44, an adjustable top plate 45 from which pressure is communicated to steel rings 4911, 4921 ... through a rubber-ring 47 and a steel disc 48. Nine steel rings are provided and each ring is formed with inwardly directed portions 5111, 5112 ... by which the rings are connected into three groups of three so that the three groups are interleaved so that no two contiguous rings belong to the same group. The middle rings of each group are provided with pairs of externally projecting ball-ends, e.g. 541, which are connected by parallel links to ball-joints carried by doublearmed levers carried by the lead and lag pivots by which the blades are connected to the hub. Specification 420,322 is referred to. According to the first Provisional Specification the damper may comprise a disc for each blade, e.g. three, the two outer discs being adjustably clamped to the inner disc, the central disc being connected to a central sleeve having a flanged foot adjustably clamped to the hub. Specification 452,364 also is referred to.
GB2866438A 1937-04-30 1937-04-30 Improvements in and relating to aircraft sustaining rotors Expired GB494739A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2866438A GB494739A (en) 1937-04-30 1937-04-30 Improvements in and relating to aircraft sustaining rotors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2866438A GB494739A (en) 1937-04-30 1937-04-30 Improvements in and relating to aircraft sustaining rotors

Publications (1)

Publication Number Publication Date
GB494739A true GB494739A (en) 1938-10-31

Family

ID=10279175

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2866438A Expired GB494739A (en) 1937-04-30 1937-04-30 Improvements in and relating to aircraft sustaining rotors

Country Status (1)

Country Link
GB (1) GB494739A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2991967A1 (en) * 2012-06-19 2013-12-20 Etienne Jean Rampal Rotor assembly for aircraft, has laminated thrust ball joint arranged between interdependent plates, rotor blades fixed with sleeve on reinforcement part using screws or bolts, and central laminated reel arranged inside hub

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2991967A1 (en) * 2012-06-19 2013-12-20 Etienne Jean Rampal Rotor assembly for aircraft, has laminated thrust ball joint arranged between interdependent plates, rotor blades fixed with sleeve on reinforcement part using screws or bolts, and central laminated reel arranged inside hub

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