CA1341239C - Radar-evading propeller blade - Google Patents
Radar-evading propeller blade Download PDFInfo
- Publication number
- CA1341239C CA1341239C CA000617103A CA617103A CA1341239C CA 1341239 C CA1341239 C CA 1341239C CA 000617103 A CA000617103 A CA 000617103A CA 617103 A CA617103 A CA 617103A CA 1341239 C CA1341239 C CA 1341239C
- Authority
- CA
- Canada
- Prior art keywords
- une
- pale
- noyau
- structural
- est
- 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 - Fee Related
Links
- 235000005921 Cynara humilis Nutrition 0.000 claims abstract description 43
- 240000002228 Cynara humilis Species 0.000 claims abstract description 43
- 239000002131 composite material Substances 0.000 claims abstract description 9
- 235000011929 mousse Nutrition 0.000 description 19
- QEVHRUUCFGRFIF-MDEJGZGSSA-N reserpine Chemical compound O([C@H]1[C@@H]([C@H]([C@H]2C[C@@H]3C4=C(C5=CC=C(OC)C=C5N4)CCN3C[C@H]2C1)C(=O)OC)OC)C(=O)C1=CC(OC)=C(OC)C(OC)=C1 QEVHRUUCFGRFIF-MDEJGZGSSA-N 0.000 description 16
- 229920002635 polyurethane Polymers 0.000 description 7
- 239000004814 polyurethane Substances 0.000 description 7
- 101150093826 par1 gene Proteins 0.000 description 6
- 230000004224 protection Effects 0.000 description 6
- 240000008042 Zea mays Species 0.000 description 5
- 235000016936 Dendrocalamus strictus Nutrition 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- 241000531908 Aramides Species 0.000 description 2
- 241000940835 Pales Species 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000004760 aramid Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229940082150 encore Drugs 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- SUBDBMMJDZJVOS-UHFFFAOYSA-N 5-methoxy-2-{[(4-methoxy-3,5-dimethylpyridin-2-yl)methyl]sulfinyl}-1H-benzimidazole Chemical compound N=1C2=CC(OC)=CC=C2NC=1S(=O)CC1=NC=C(C)C(OC)=C1C SUBDBMMJDZJVOS-UHFFFAOYSA-N 0.000 description 1
- 241000195940 Bryophyta Species 0.000 description 1
- 101100536354 Drosophila melanogaster tant gene Proteins 0.000 description 1
- 206010052804 Drug tolerance Diseases 0.000 description 1
- 241000594011 Leuciscus leuciscus Species 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 241000287107 Passer Species 0.000 description 1
- 241001237728 Precis Species 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 241001080024 Telles Species 0.000 description 1
- 241000897276 Termes Species 0.000 description 1
- 239000004963 Torlon Substances 0.000 description 1
- 229920003997 Torlon® Polymers 0.000 description 1
- 241001125929 Trisopterus luscus Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 235000015107 ale Nutrition 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 206010037833 rales Diseases 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 210000002105 tongue Anatomy 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT 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
La pale est à faible signature radar, en matériaux composites. Elle comporte un noyau structural assurant une résistance structurale de la pale, et un revêtement d'habillage entourant le noyau structural. Le revêtement comprend une coque externe rigide ayant un profil aerodynamique souhaité, realisée en matériaux diélectriques, et une couche d'un matériau de conformation non travaillant, léger et souple, assurant un remplissage entre le noyau et la coque externe, et absorbant des ondes électromagnétiques de façon à former un écran radar.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8709079A FR2748719B1 (fr) | 1987-06-26 | 1987-06-26 | Pale a faible signature radar |
| CA000570166A CA1340376C (fr) | 1987-06-26 | 1988-06-23 | Weak radar signature blade |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000570166A Division CA1340376C (fr) | 1987-06-26 | 1988-06-23 | Weak radar signature blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1341239C true CA1341239C (fr) | 2001-05-22 |
Family
ID=9352587
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000617103A Expired - Fee Related CA1341239C (fr) | 1987-06-26 | 1988-06-23 | Radar-evading propeller blade |
| CA000570166A Expired - Fee Related CA1340376C (fr) | 1987-06-26 | 1988-06-23 | Weak radar signature blade |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000570166A Expired - Fee Related CA1340376C (fr) | 1987-06-26 | 1988-06-23 | Weak radar signature blade |
Country Status (6)
| Country | Link |
|---|---|
| CA (2) | CA1341239C (fr) |
| DE (1) | DE3821588C1 (fr) |
| FR (1) | FR2748719B1 (fr) |
| GB (1) | GB2327925B (fr) |
| IT (1) | IT8867528A0 (fr) |
| NL (1) | NL8801562A (fr) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008024644B4 (de) | 2008-05-21 | 2018-07-26 | Airbus Defence and Space GmbH | Rotorblatt mit darin integriertem Radarabsorber für eine Windkraftanlage |
| DE102010039705B4 (de) | 2010-08-24 | 2020-02-27 | Airbus Operations Gmbh | Strukturelement für ein Luft- und Raumfahrzeug und Verfahren zum Herstellen eines derartigen Strukturelementes |
| FR2964941B1 (fr) | 2010-09-16 | 2013-03-08 | Eurocopter France | Pale a vulnerabilite minimisee |
| GB2485524A (en) * | 2010-10-26 | 2012-05-23 | Vestas Wind Sys As | Foam core containing radar absorbing materials for composite structures |
| US9033672B2 (en) * | 2012-01-11 | 2015-05-19 | General Electric Company | Wind turbines and wind turbine rotor blades with reduced radar cross sections |
| US9033671B2 (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 (fr) * | 2012-12-27 | 2016-02-05 | Eads Europ Aeronautic Defence | Dispositif d'absorption d'energie pour element de structure d'aeronef |
| CN106542079B (zh) * | 2016-11-25 | 2019-03-01 | 江西洪都航空工业集团有限责任公司 | 一种结构型吸波蒙皮设计方法 |
| CN113687323B (zh) * | 2021-10-26 | 2022-03-08 | 中国航发四川燃气涡轮研究院 | 一种用于二元矢量发动机的低散射壳体及其应用 |
| US11795827B1 (en) * | 2022-04-04 | 2023-10-24 | General Electric Company | Airfoil assembly with a structurally reinforced foam core |
Family Cites Families (5)
| 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 (fr) * | 1977-02-28 | 1978-09-22 | Aerospatiale | Pale, notamment pour un rotor d'helicoptere, et son procede de fabrication |
| US4316700A (en) * | 1979-04-03 | 1982-02-23 | Schramm Burford J | Unitary, bonded-together helicopter rotorblade |
| DE3307066A1 (de) * | 1983-03-01 | 1984-09-13 | Dornier Gmbh, 7990 Friedrichshafen | Mehrschichtiger faserverbundwerkstoff |
-
1987
- 1987-06-26 FR FR8709079A patent/FR2748719B1/fr not_active Expired - Fee Related
-
1988
- 1988-06-07 IT IT8867528A patent/IT8867528A0/it unknown
- 1988-06-20 NL NL8801562A patent/NL8801562A/nl not_active Application Discontinuation
- 1988-06-22 GB GB8814781A patent/GB2327925B/en not_active Expired - Fee Related
- 1988-06-23 CA CA000617103A patent/CA1341239C/fr not_active Expired - Fee Related
- 1988-06-23 CA CA000570166A patent/CA1340376C/fr not_active Expired - Fee Related
- 1988-06-27 DE DE3821588A patent/DE3821588C1/de not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| NL8801562A (nl) | 1998-01-05 |
| DE3821588C1 (de) | 1998-02-26 |
| GB8814781D0 (en) | 1998-11-25 |
| FR2748719A1 (fr) | 1997-11-21 |
| GB2327925B (en) | 1999-06-02 |
| FR2748719B1 (fr) | 1999-05-07 |
| CA1340376C (fr) | 1999-02-02 |
| IT8867528A0 (it) | 1988-06-07 |
| GB2327925A (en) | 1999-02-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |