GB1188947A - Improvements in or relating to Lift Rotors and Propellers. - Google Patents

Improvements in or relating to Lift Rotors and Propellers.

Info

Publication number
GB1188947A
GB1188947A GB47725/66A GB4772566A GB1188947A GB 1188947 A GB1188947 A GB 1188947A GB 47725/66 A GB47725/66 A GB 47725/66A GB 4772566 A GB4772566 A GB 4772566A GB 1188947 A GB1188947 A GB 1188947A
Authority
GB
United Kingdom
Prior art keywords
blade
spar
oct
keys
end fitting
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
GB47725/66A
Inventor
Kenneth Watson
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
Priority to GB47725/66A priority Critical patent/GB1188947A/en
Priority to DE19671531475 priority patent/DE1531475B1/en
Publication of GB1188947A publication Critical patent/GB1188947A/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
    • B64C27/22—Compound rotorcraft, i.e. aircraft using in flight the features of both aeroplane and rotorcraft
    • B64C27/28—Compound rotorcraft, i.e. aircraft using in flight the features of both aeroplane and rotorcraft with forward-propulsion propellers pivotable to act as lifting rotors

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

1,188,947. Variable twist propeller blades. WESTLAND AIRCRAFT Ltd. 6 Oct., 1967 [24 Oct., 1966], No. 47725/66. Heading B7W. A variable twist rotor or propeller blade comprises a substantially hollow blade 10 having a twistable envelope 11 enclosing a series of rib members 12 each engaging helical keys 14 on a spar 13, having at its inboard end a chamber 16 movable (e.g. along splines) within an end fitting 17 which has means (e.g. a piston 19 and a passage 25 to admit hydraulic fluid to the cylinder 20) to move the spar lengthwise of the blade moving the ribs along the keys 14 to warp the blade. The end fitting 17 may have an arm 24 to effect blade pitch change.
GB47725/66A 1966-10-24 1966-10-24 Improvements in or relating to Lift Rotors and Propellers. Expired GB1188947A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB47725/66A GB1188947A (en) 1966-10-24 1966-10-24 Improvements in or relating to Lift Rotors and Propellers.
DE19671531475 DE1531475B1 (en) 1966-10-24 1967-08-26 Torsion and pitch changeable rotor blade

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB47725/66A GB1188947A (en) 1966-10-24 1966-10-24 Improvements in or relating to Lift Rotors and Propellers.

Publications (1)

Publication Number Publication Date
GB1188947A true GB1188947A (en) 1970-04-22

Family

ID=10446041

Family Applications (1)

Application Number Title Priority Date Filing Date
GB47725/66A Expired GB1188947A (en) 1966-10-24 1966-10-24 Improvements in or relating to Lift Rotors and Propellers.

Country Status (2)

Country Link
DE (1) DE1531475B1 (en)
GB (1) GB1188947A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4364708A (en) * 1981-08-27 1982-12-21 David Constant V Windmill
US8579587B2 (en) 2009-07-28 2013-11-12 Eurocopter Method of reducing or even eliminating the vibration of a rotorcraft lift and propulsion rotor, and an airfoil assembly and a rotor implementing said method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3943075A1 (en) * 1989-12-27 1991-07-04 Ferdinand Dr Lutz Aircraft propeller blade - is twisted about radial axis and is constructed from segments enclosed in elastic envelope
ITTO20110981A1 (en) 2011-10-28 2012-01-27 Torino Politecnico AERODYNAMIC PROFILE WITH VARIABLE SUSPENSION.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB737175A (en) * 1952-06-20 1955-09-21 Reginald Thomas Wood Improvements in or relating to retractable rotor blade sustention means for aircraftor rotary-wing parachutes
GB880590A (en) * 1959-11-06 1961-10-25 Hugo Torben Grut Propeller with adjustable blade twist
GB976296A (en) * 1961-12-14 1964-11-25 Hugo Torben Grut Variable pitch propeller or rotor
DE1257020B (en) * 1964-03-28 1967-12-21 Boelkow Gmbh Stopper rotor for a combination airplane

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4364708A (en) * 1981-08-27 1982-12-21 David Constant V Windmill
US8579587B2 (en) 2009-07-28 2013-11-12 Eurocopter Method of reducing or even eliminating the vibration of a rotorcraft lift and propulsion rotor, and an airfoil assembly and a rotor implementing said method

Also Published As

Publication number Publication date
DE1531475B1 (en) 1970-05-27

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees