GB2228142A - Radome - Google Patents
Radome Download PDFInfo
- Publication number
- GB2228142A GB2228142A GB8927529A GB8927529A GB2228142A GB 2228142 A GB2228142 A GB 2228142A GB 8927529 A GB8927529 A GB 8927529A GB 8927529 A GB8927529 A GB 8927529A GB 2228142 A GB2228142 A GB 2228142A
- Authority
- GB
- United Kingdom
- Prior art keywords
- radome
- layers
- core
- polyimide
- matrix
- 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
Links
- 239000011159 matrix material Substances 0.000 claims abstract description 14
- 239000004642 Polyimide Substances 0.000 claims abstract description 12
- 229920001721 polyimide Polymers 0.000 claims abstract description 12
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 8
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 6
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 6
- 239000002861 polymer material Substances 0.000 claims abstract description 5
- 239000000853 adhesive Substances 0.000 claims abstract description 4
- 230000001070 adhesive effect Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- XQUPVDVFXZDTLT-UHFFFAOYSA-N 1-[4-[[4-(2,5-dioxopyrrol-1-yl)phenyl]methyl]phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C(C=C1)=CC=C1CC1=CC=C(N2C(C=CC2=O)=O)C=C1 XQUPVDVFXZDTLT-UHFFFAOYSA-N 0.000 claims description 2
- PEEHTFAAVSWFBL-UHFFFAOYSA-N Maleimide Chemical compound O=C1NC(=O)C=C1 PEEHTFAAVSWFBL-UHFFFAOYSA-N 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 229920003192 poly(bis maleimide) Polymers 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims description 2
- 229920006259 thermoplastic polyimide Polymers 0.000 claims 2
- 239000004693 Polybenzimidazole Substances 0.000 claims 1
- 229920002480 polybenzimidazole Polymers 0.000 claims 1
- 229920000642 polymer Polymers 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 2
- 229920002994 synthetic fiber Polymers 0.000 abstract 1
- 239000011162 core material Substances 0.000 description 10
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
- F42B10/32—Range-reducing or range-increasing arrangements; Fall-retarding means
- F42B10/38—Range-increasing arrangements
- F42B10/42—Streamlined projectiles
- F42B10/46—Streamlined nose cones; Windshields; Radomes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
- B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
- H01Q1/422—Housings not intimately mechanically associated with radiating elements, e.g. radome comprising two or more layers of dielectric material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2379/00—Other polymers having nitrogen, with or without oxygen or carbon only, in the main chain
- B32B2379/08—Polyimides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2571/00—Protective equipment
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Laminated Bodies (AREA)
Abstract
A radome with high temperature properties for a projectile comprises a synthetic material core (1) and an inner and an outer thin-walled covering layer (2, 3). The core (1) is made of polyimide needle felt and the layers (2, 3) of the thermosetting or thermoplastic matrix or polymer materials unaffected by high temperature, the core (1) and the layers (2, 3) being firmly connected together without a heterogeneous adhesive substance. <IMAGE>
Description
RADOME
The present invention relates to a radome for a Projectile.
Known radomes may have, for example, a core of syntactic material.
In that case it is disadvantageous that the core material is susceptible to tearing under high temperature stresses, since the core material, in consequence of a relatively high thermal coefficient of expansion, has a poor shear strength relative to its covering layers.
There is therefore a need for a radome, the mechanical, thermal and dielectric properties of which are suitable for a durable high temperature use, for example up to 3200C.
According to the present invention there is provided a radome for a Drojectile comDrising a core of polyimide needle felt and inner and outer thin-wall covering layers of high-temperature-resistant thermosetting or thermoplastic matrix or polymer material, the core and the layers being firmly connected together without use of a heterogeneous adhesive material.
A radome embodying the invention may have the advantage that gluing of the covering layers to the core is redundant. The core of polyimide needle felt can be so compacted by means of temperature and pressure that a spherically deformed material of high stiffness and low weight with good dielectric properties results. It is also of advantage that directionally dependent mechanical properties, for example hardness, elasticity and strength, as well as a low dielectric constant 8, a low loss angleS and a high stiffness, can be achieved with a core material of polyimide needle felt.
An embodiment of the present invention will now be more particularly described by way of example with reference to the accompanying drawing, the single figure of which is a sectional view of part of a radome embodying the invention.
Referring now to the drawing, there is shown part of a radome which is constructed as a hybrid radome and which has a core 1 of polyimide needle felt as well as an inner covering layer 2 and an outer covering layer 3 of thermosetting or thermoplastic matrix or polymer materials, which can be fibre-reinforced. The fibre reinforcement can consist of endless fibres. The layers 2 and 3, which are firmly connected with the core of polyimide needle felt by a temperature-pressure process without an unlike or heterogeneous adhesive substance, can consist of thermosetting polyimide matrix material, for example on the basis of a maleimide resin, or of thermoplastic Dolyimide matrix material, or bismaleimide resins or aromatic polyimides can be used. The matrix material is preferably fibre-reinforced.
Claims (9)
1. A radome for a projectile comprising a core of polyimide needle felt and inner and outer thin-wall covering layers of high-temperature
resistant thermosetting or thermoplastic matrix or polymer material, the core and the layers being firmly connected together without use
of a heterogeneous adhesive material.
2. A radome as claimed in claim 1, wherein the material of the layers is a thermosetting polyimide matrix material.
3. Aradome as claimed in claim 3, wherein the matrix material is based
on maleimide resin.
4. A radome as claimed in claim 1, wherein the material of the layers
is a thermoplastic polyimide matrix material.
5. A radome as claimed in claim 1, wherein the material of the layers
is a fibre-reinforced thermosetting or thermoplastic matrix or polymer material, a fibre-reinforced thermosetting polyimide matrix material, or a fibre-reinforced thermoplastic polyimide matrix material.
6. A radome as claimed in either claim 2 or claim 5, wherein the matrix material is bismaleimide resin or aromatic polyimide.
7. A radome as claimed in claim 1, wherein the material of the layers
is polybenzimidazole polymer.
8. A radome as claimed in claim 5, wherein the fibre reinforcement comprises endless fibres.
9. A radome as claimed in any one of the preceding claims, wherein the core and the covering layers are connected together by a temperaturepressure process.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19883841162 DE3841162A1 (en) | 1988-12-07 | 1988-12-07 | Radome having high-temperature properties |
| DE19893938230 DE3938230A1 (en) | 1989-11-17 | 1989-11-17 | Radome cover esp. for missile |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8927529D0 GB8927529D0 (en) | 1990-02-07 |
| GB2228142A true GB2228142A (en) | 1990-08-15 |
| GB2228142B GB2228142B (en) | 1993-01-06 |
Family
ID=25874886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8927529A Expired - Fee Related GB2228142B (en) | 1988-12-07 | 1989-12-06 | Radome |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2228142B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2277200A (en) * | 1993-04-16 | 1994-10-19 | British Aerospace | A cover for a spacecraft antenna |
| JP2017519180A (en) * | 2014-06-25 | 2017-07-13 | エムベデア フランス | Missile structure wall especially for thermal protection fairing |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4677443A (en) * | 1979-01-26 | 1987-06-30 | The Boeing Company | Broadband high temperature radome apparatus |
-
1989
- 1989-12-06 GB GB8927529A patent/GB2228142B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4677443A (en) * | 1979-01-26 | 1987-06-30 | The Boeing Company | Broadband high temperature radome apparatus |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2277200A (en) * | 1993-04-16 | 1994-10-19 | British Aerospace | A cover for a spacecraft antenna |
| GB2277200B (en) * | 1993-04-16 | 1997-03-12 | British Aerospace | A cover for a spacecraft antenna |
| JP2017519180A (en) * | 2014-06-25 | 2017-07-13 | エムベデア フランス | Missile structure wall especially for thermal protection fairing |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8927529D0 (en) | 1990-02-07 |
| GB2228142B (en) | 1993-01-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19941206 |