GB1333852A - Helicopters - Google Patents

Helicopters

Info

Publication number
GB1333852A
GB1333852A GB401171A GB1333852DA GB1333852A GB 1333852 A GB1333852 A GB 1333852A GB 401171 A GB401171 A GB 401171A GB 1333852D A GB1333852D A GB 1333852DA GB 1333852 A GB1333852 A GB 1333852A
Authority
GB
United Kingdom
Prior art keywords
blade
flange
central portion
hinge
secured
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
GB401171A
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.)
Westland Group PLC
Original Assignee
Westland Aircraft 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 Westland Aircraft Ltd filed Critical Westland Aircraft Ltd
Publication of GB1333852A publication Critical patent/GB1333852A/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
    • B64C27/32—Rotors
    • B64C27/46—Blades
    • B64C27/473—Constructional features
    • B64C27/50—Blades foldable to facilitate stowage of aircraft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/54—Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Transmission Devices (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Toys (AREA)

Abstract

1333852 Hinge WESTLAND AIRCRAFT Ltd 20 Jan 1972 [5 Feb 1971] 4011/70 Heading E2F [Also in Division B7] A hinge 19 of a helicopter rotor blade comprises: a leading portion 21 and a trailing portion 22 both secured to a flange 27 which is fixed to the inboard section 25 of a blade; and a central portion 23 rotatable relative to the leading and trailing portions, driven by an electric motor 37 through gears 38, and secured to a flange 28 fixed to the outboard section of the blade through an integral flange 31 of the central portion 23. When the blade is extended, an arm 35, Fig. 5, of the central portion 23 enters a recess formed in the flange 24 to mate therewith. A blade lock actuator 35 has a ram 36 which then enters holes in the arms 35 and flange 24 to lock the blade. An integral automatic locking arrangement, may be incorporated instead.
GB401171A 1971-02-05 1972-01-20 Helicopters Expired GB1333852A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB401171 1971-02-05

Publications (1)

Publication Number Publication Date
GB1333852A true GB1333852A (en) 1973-10-17

Family

ID=9769083

Family Applications (1)

Application Number Title Priority Date Filing Date
GB401171A Expired GB1333852A (en) 1971-02-05 1972-01-20 Helicopters

Country Status (4)

Country Link
US (1) US3750982A (en)
CA (1) CA975341A (en)
FR (1) FR2124474B1 (en)
GB (1) GB1333852A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3802798A (en) * 1973-01-30 1974-04-09 Us Air Force Rotor blade capturing assembly
GB1472540A (en) * 1973-08-28 1977-05-04 Westland Aircraft Ltd Helicopters
US4071206A (en) * 1976-09-20 1978-01-31 Aerospace General Co. Portable helicopter
EP0080292B1 (en) * 1981-11-19 1986-07-23 WESTLAND plc Helicopter rotors
US5915649A (en) * 1996-08-23 1999-06-29 Mcdonnell Douglas Helicopter Company Roadable helicopter
GB0301370D0 (en) * 2003-01-22 2003-02-19 Secr Defence A wing for a compound helicopter
KR101083731B1 (en) 2004-09-20 2011-11-16 한국항공우주산업 주식회사 Helicopter
US7985048B2 (en) * 2007-09-25 2011-07-26 The Boeing Company Folding rotor for an autogyro device
DE102012100102B4 (en) * 2012-01-06 2015-09-24 Deutsches Zentrum für Luft- und Raumfahrt e.V. helicopter configuration
ZA201305905B (en) * 2012-08-07 2014-04-30 Epsilon Eng Services (Pty) Ltd A hinge arrangement
EP2883791B1 (en) 2013-12-10 2016-04-06 AIRBUS HELICOPTERS DEUTSCHLAND GmbH Helicopter with a Tail shroud
US9592910B1 (en) 2015-12-18 2017-03-14 Amazon Technologies, Inc. Geometrically reconfigurable propellers
US10370098B1 (en) 2015-12-18 2019-08-06 Amazon Technologies, Inc. Adjustable propeller blade with sound flaps
US10287006B1 (en) * 2015-12-18 2019-05-14 Amazon Technologies, Inc. Adjustable propeller blades for sound control
NL1043196B1 (en) * 2019-03-18 2020-09-25 Pal V Ip B V Rotor blades of a lift rotor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2815820A (en) * 1955-04-19 1957-12-10 Gyrodyne Company Of America In Power folding rotor blade system for rotary wing aircraft
US2941604A (en) * 1956-11-05 1960-06-21 Ira J Marriage Blade structure for airplane propellers

Also Published As

Publication number Publication date
CA975341A (en) 1975-09-30
DE2204619A1 (en) 1972-09-21
FR2124474B1 (en) 1977-11-10
US3750982A (en) 1973-08-07
DE2204619B2 (en) 1977-04-07
FR2124474A1 (en) 1972-09-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees