GB8814781D0 - Blade with a weak radar signature - Google Patents

Blade with a weak radar signature

Info

Publication number
GB8814781D0
GB8814781D0 GBGB8814781.4A GB8814781A GB8814781D0 GB 8814781 D0 GB8814781 D0 GB 8814781D0 GB 8814781 A GB8814781 A GB 8814781A GB 8814781 D0 GB8814781 D0 GB 8814781D0
Authority
GB
United Kingdom
Prior art keywords
blade
skin
core
radar signature
electromagnetic waves
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.)
Granted
Application number
GBGB8814781.4A
Other versions
GB2327925A (en
GB2327925B (en
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.)
Airbus Group SAS
Aerospatiale Matra
Original Assignee
Airbus Group SAS
Aerospatiale Matra
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 Airbus Group SAS, Aerospatiale Matra filed Critical Airbus Group SAS
Priority to GB9018077A priority Critical patent/GB2327926B/en
Publication of GB8814781D0 publication Critical patent/GB8814781D0/en
Publication of GB2327925A publication Critical patent/GB2327925A/en
Application granted granted Critical
Publication of GB2327925B publication Critical patent/GB2327925B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D7/00—Arrangements of military equipment, e.g. armaments, armament accessories, or military shielding, in aircraft; Adaptations of armament mountings for aircraft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/16—Blades
    • B64C11/20—Constructional features
    • B64C11/26—Fabricated blades
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C3/00—Wings
    • B64C3/20—Integral or sandwich constructions
    • 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
    • B64C2027/4733—Rotor blades substantially made from particular materials
    • B64C2027/4736—Rotor blades substantially made from particular materials from composite materials

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Aerials With Secondary Devices (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

A blade (10) with a weak radar signature comprises a rigid working skin (13), a leading edge spar (12) and a central spar (15) produced from dielectric materials and filling elements (17a, 17b) each formed of a material absorbing electromagnetic waves. Alternatively, the skin (13), the spars (12,15) and filling elements (17a, 17b) are assembled as a core (11) providing the structural strength of the blade (10) and surrounded with a covering coating (18) comprising a rigid and profiled external skin (19a, 19b), made from dielectric materials, and a layer (20a, 20b) of a flexible and light synthetic material, absorbing electromagnetic waves and providing the filling between the core (11) and the external skin (19a, 19b), in such a way as to form a radar screen. The blade is adapted in particular to the rotors of military helicopters.
GB8814781A 1987-06-26 1988-06-22 Blade with a weak radar signature Expired - Fee Related GB2327925B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9018077A GB2327926B (en) 1987-06-26 1988-06-22 Blade with a weak radar signature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8709079A FR2748719B1 (en) 1987-06-26 1987-06-26 LOW SIGNATURE RADAR BLADE

Publications (3)

Publication Number Publication Date
GB8814781D0 true GB8814781D0 (en) 1998-11-25
GB2327925A GB2327925A (en) 1999-02-10
GB2327925B GB2327925B (en) 1999-06-02

Family

ID=9352587

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8814781A Expired - Fee Related GB2327925B (en) 1987-06-26 1988-06-22 Blade with a weak radar signature

Country Status (6)

Country Link
CA (2) CA1341239C (en)
DE (1) DE3821588C1 (en)
FR (1) FR2748719B1 (en)
GB (1) GB2327925B (en)
IT (1) IT8867528A0 (en)
NL (1) NL8801562A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116892415B (en) * 2022-04-04 2024-03-26 通用电气公司 Airfoil assembly with structurally reinforced foam core

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008024644B4 (en) 2008-05-21 2018-07-26 Airbus Defence and Space GmbH Rotor blade with integrated radar absorber for a wind turbine
DE102010039705B4 (en) * 2010-08-24 2020-02-27 Airbus Operations Gmbh Structural element for an aircraft and spacecraft and method for producing such a structural element
FR2964941B1 (en) 2010-09-16 2013-03-08 Eurocopter France MINIMIZED VULNERABILITY BLADE
GB2485524A (en) * 2010-10-26 2012-05-23 Vestas Wind Sys As Foam core containing radar absorbing materials for composite structures
US9033671B2 (en) * 2012-01-11 2015-05-19 General Electric Company Wind turbines and wind turbine rotor blades with reduced radar cross sections
US9033672B2 (en) * 2012-01-11 2015-05-19 General Electric Company Wind turbines and wind turbine rotor blades with reduced radar cross sections
US9140234B2 (en) 2012-01-11 2015-09-22 General Electric Company Wind turbine rotor blades with reduced radar cross sections
FR3000463B1 (en) * 2012-12-27 2016-02-05 Eads Europ Aeronautic Defence ENERGY ABSORPTION DEVICE FOR AN AIRCRAFT STRUCTURE ELEMENT
CN106542079B (en) * 2016-11-25 2019-03-01 江西洪都航空工业集团有限责任公司 A kind of structure-type wave-absorption covering design method
CN113687323B (en) * 2021-10-26 2022-03-08 中国航发四川燃气涡轮研究院 Low-scattering shell for binary vector engine and application thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006479A (en) * 1969-02-04 1977-02-01 The United States Of America As Represented By The Secretary Of The Air Force Method for dispersing metallic particles in a dielectric binder
US4083656A (en) * 1975-03-21 1978-04-11 Textron, Inc. Composite rotor blade
FR2381662A1 (en) * 1977-02-28 1978-09-22 Aerospatiale BLADE, ESPECIALLY FOR A HELICOPTER ROTOR, AND ITS MANUFACTURING PROCESS
US4316700A (en) * 1979-04-03 1982-02-23 Schramm Burford J Unitary, bonded-together helicopter rotorblade
DE3307066A1 (en) * 1983-03-01 1984-09-13 Dornier Gmbh, 7990 Friedrichshafen MULTILAYER FIBER COMPOSITE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116892415B (en) * 2022-04-04 2024-03-26 通用电气公司 Airfoil assembly with structurally reinforced foam core

Also Published As

Publication number Publication date
DE3821588C1 (en) 1998-02-26
GB2327925A (en) 1999-02-10
FR2748719A1 (en) 1997-11-21
CA1340376C (en) 1999-02-02
FR2748719B1 (en) 1999-05-07
IT8867528A0 (en) 1988-06-07
GB2327925B (en) 1999-06-02
CA1341239C (en) 2001-05-22
NL8801562A (en) 1998-01-05

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Legal Events

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

Effective date: 20060622