GB557011A - Improvements in or relating to helicopters - Google Patents

Improvements in or relating to helicopters

Info

Publication number
GB557011A
GB557011A GB542442A GB542442A GB557011A GB 557011 A GB557011 A GB 557011A GB 542442 A GB542442 A GB 542442A GB 542442 A GB542442 A GB 542442A GB 557011 A GB557011 A GB 557011A
Authority
GB
United Kingdom
Prior art keywords
blade
space
gases
nozzle
ring
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
GB542442A
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.)
Weir Group PLC
Original Assignee
G&J Weir 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 G&J Weir Ltd filed Critical G&J Weir Ltd
Priority to GB542442A priority Critical patent/GB557011A/en
Publication of GB557011A publication Critical patent/GB557011A/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
    • B64C27/04—Helicopters
    • B64C27/12—Rotor drives
    • B64C27/16—Drive of rotors by means, e.g. propellers, mounted on rotor blades
    • B64C27/18—Drive of rotors by means, e.g. propellers, mounted on rotor blades the means being jet-reaction apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

557,011. Helicopters. WEIR, Ltd., G. & J., and PULLIN, C. G. April 22, 1942, No. 5424 [Class 4] [Also in Group XXVI] The invention is concerned with the construction of jet driven blades and the provision of gas sealing means between relatively rotatable parts of the gas ducts through a helicopter rotor hub. Packing rings 52, 53 of moulded compressed carbon are secured within the upper and lower parts 48, 49 of a member tiltable upon a fixed hollow spherical support 47 which the packings closely fit. A hub 65 rotatable upon the tiltable member is sealed against gas leakage at its lower side by piston rings 71 carried by a ring 72 on the member 49. Similar rings 88 prevent escape of gases between each blade root 82 and a member 75 upon which the blade can tilt to vary the pitch of the ring system. The members 75 have belled ends bearing against spherical seatings 76 screwed into projections 74 on the hub and carbon-base packing material 77a is moulded into grooves in the seating against which the belled ends of the members 75 are pressed by springs 79 acting upon a ring 80 carrying a ring of frictional material 78. The blades are formed with a stressed skin stiffened by longitudinal spars 124, Fig. 6, the forward space 145 being D-shaped. At the root the forward portion is swaged to form a circular flared portion 116, 82 in which is secured an inner tube 114 for conveying the gases to the forward space 145 and to the nozzle at the blade tip. The space 145 is lined with insulating material and the skin is coated with an asbestos-base enamel. The spars 124 terminate in a bulkhead 144 braced to the tube 116 by a stay 140, a fairing 143 closing the inner end of the blade. In a modification the central space between the two spars is lined with insulating material having a forward air inlet 137. insulating material and the gases pass through it to an ejector nozzle 138, Fig. 13, having a forward air inlet 137. The forward space encloses a weight 135 for balancing the blade. In another form the gases issue from a venturi shaped nozzle without air inlet and a balance weight is mounted at the forward end of the nozzle.
GB542442A 1942-04-22 1942-04-22 Improvements in or relating to helicopters Expired GB557011A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB542442A GB557011A (en) 1942-04-22 1942-04-22 Improvements in or relating to helicopters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB542442A GB557011A (en) 1942-04-22 1942-04-22 Improvements in or relating to helicopters

Publications (1)

Publication Number Publication Date
GB557011A true GB557011A (en) 1943-11-01

Family

ID=9795923

Family Applications (1)

Application Number Title Priority Date Filing Date
GB542442A Expired GB557011A (en) 1942-04-22 1942-04-22 Improvements in or relating to helicopters

Country Status (1)

Country Link
GB (1) GB557011A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2590457A (en) * 1946-04-20 1952-03-25 Sigma Jet propulsion device for airscrews or rotary wings
US2596378A (en) * 1945-07-03 1952-05-13 David T Dobbins Helicopter blade pitch control mechanism
US2605608A (en) * 1946-06-27 1952-08-05 Jr Frank D Barclay Jet reaction motor
US2638990A (en) * 1947-04-01 1953-05-19 Autogiro Co Of America Aircraft sustaining rotor blade with airflow control
US2673696A (en) * 1946-05-24 1954-03-30 Autogiro Co Of America Helicopter having a jet-driven rotor system
WO1996025328A1 (en) * 1995-02-16 1996-08-22 Michel Milot Combined cycle compressed air tip jet driven helicopter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2596378A (en) * 1945-07-03 1952-05-13 David T Dobbins Helicopter blade pitch control mechanism
US2590457A (en) * 1946-04-20 1952-03-25 Sigma Jet propulsion device for airscrews or rotary wings
US2673696A (en) * 1946-05-24 1954-03-30 Autogiro Co Of America Helicopter having a jet-driven rotor system
US2605608A (en) * 1946-06-27 1952-08-05 Jr Frank D Barclay Jet reaction motor
US2638990A (en) * 1947-04-01 1953-05-19 Autogiro Co Of America Aircraft sustaining rotor blade with airflow control
WO1996025328A1 (en) * 1995-02-16 1996-08-22 Michel Milot Combined cycle compressed air tip jet driven helicopter

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