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GB1367197A - Advanced geometry main rotor blade - Google Patents

Advanced geometry main rotor blade

Info

Publication number
GB1367197A
GB1367197A GB2311872A GB2311872A GB1367197A GB 1367197 A GB1367197 A GB 1367197A GB 2311872 A GB2311872 A GB 2311872A GB 2311872 A GB2311872 A GB 2311872A GB 1367197 A GB1367197 A GB 1367197A
Authority
GB
United Kingdom
Prior art keywords
root
tip
blade
curve
decreasing
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
GB2311872A
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.)
Textron Inc
Original Assignee
Textron Inc
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
Priority claimed from US00143850A external-priority patent/US3829240A/en
Priority claimed from US00143970A external-priority patent/US3799700A/en
Application filed by Textron Inc filed Critical Textron Inc
Publication of GB1367197A publication Critical patent/GB1367197A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C29/00—Aircraft capable of landing or taking-off vertically, e.g. vertical take-off and landing [VTOL] aircraft
    • B64C29/0008—Aircraft capable of landing or taking-off vertically, e.g. vertical take-off and landing [VTOL] aircraft having its flight directional axis horizontal when grounded
    • B64C29/0016—Aircraft capable of landing or taking-off vertically, e.g. vertical take-off and landing [VTOL] aircraft having its flight directional axis horizontal when grounded the lift during taking-off being created by free or ducted propellers or by blowers
    • B64C29/0033—Aircraft capable of landing or taking-off vertically, e.g. vertical take-off and landing [VTOL] aircraft having its flight directional axis horizontal when grounded the lift during taking-off being created by free or ducted propellers or by blowers the propellers being tiltable relative to the fuselage

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

1367197 Rotor blade; propellers TEXTRON Inc 17 May 1972 [17 May 1971 (2)] 23118/72 Headings B7V and B7W A blade for a convertiplane prop rotor has a unitary structure and its twist and camber vary non-linearly from root to tip, the twist angle between blade chord and a reference plane decreasing linearly from root to an intermediate point and decreasing less severely from that point to the tip, curve 24, Fig. 3, and camber decreasing from the root to an intermediate point and increasing from that point to the tip, curve 25. As a result aerodynamic twist, curve 26, decreases from root to tip, the major change being in the inboard 40% of span. The blade comprises a spar 30 formed from channels 33, 34, 35, and a panel 40, and a trailing section 31 having upper and lower skins 50, 51 with honeycomb units adhesively secured thereto, with the cells substantially perpendicular to the blade chord. The parts are secured by bonding with heat-setting adhesive and as pressure is applied during manufacture the honeycomb units intersect. A fitting (70), Fig. 10 (not shown), in an extension (60) of the spar 30 receives, on needle bearings, a spindle (71) of a hub.
GB2311872A 1971-05-17 1972-05-17 Advanced geometry main rotor blade Expired GB1367197A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US00143850A US3829240A (en) 1971-05-17 1971-05-17 Advanced geometry main rotor blade
US00143970A US3799700A (en) 1971-05-17 1971-05-17 Main rotor blade construction

Publications (1)

Publication Number Publication Date
GB1367197A true GB1367197A (en) 1974-09-18

Family

ID=26841459

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2311872A Expired GB1367197A (en) 1971-05-17 1972-05-17 Advanced geometry main rotor blade

Country Status (5)

Country Link
AU (1) AU459383B2 (en)
DE (1) DE2223567A1 (en)
FR (1) FR2137921B1 (en)
GB (1) GB1367197A (en)
IT (1) IT957890B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2363774A (en) * 2000-06-09 2002-01-09 Cartercopters Llc Aircraft rotor aerofoil suitable for forward and reverse flow

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4275994A (en) * 1978-04-03 1981-06-30 Textron, Inc. Roll formed blade structure
DE3310937C2 (en) * 1982-10-09 1984-10-31 Dornier Gmbh, 7990 Friedrichshafen Propeller blades, in particular for propelling aircraft

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1369600A (en) * 1963-07-23 1964-08-14 Electric Auto Lite Co Propeller, especially for vertical take-off and landing airplanes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2363774A (en) * 2000-06-09 2002-01-09 Cartercopters Llc Aircraft rotor aerofoil suitable for forward and reverse flow

Also Published As

Publication number Publication date
IT957890B (en) 1973-10-20
FR2137921A1 (en) 1972-12-29
DE2223567A1 (en) 1972-12-07
FR2137921B1 (en) 1976-08-06
AU459383B2 (en) 1975-03-27
AU4201172A (en) 1973-11-15

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee