GB2267557A - Ejection mechanism for submunitions - Google Patents
Ejection mechanism for submunitions Download PDFInfo
- Publication number
- GB2267557A GB2267557A GB8721100A GB8721100A GB2267557A GB 2267557 A GB2267557 A GB 2267557A GB 8721100 A GB8721100 A GB 8721100A GB 8721100 A GB8721100 A GB 8721100A GB 2267557 A GB2267557 A GB 2267557A
- Authority
- GB
- United Kingdom
- Prior art keywords
- holder
- base frame
- hinged
- axis
- assembly
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
- F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
- F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
- F42B12/56—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies
- F42B12/58—Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles
- F42B12/60—Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles the submissiles being ejected radially
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Tents Or Canopies (AREA)
Abstract
An ejection mechanism for submunitions comprises a holder 1 connected to a base frame 3 by means of two approximately orthogonal hinged linkages of which at least one provides slightly non-parallel coupling whereby as the holder moves relative to the base frame the said one linkage is constrained to impart a velocity to the holder about either a yaw or roll axis. One linkage comprises two panels 4, 5 hinged together at 7, and to the holder 1 and the frame 3 at 6 and 8 respectively. The other orthogonally disposed linkage comprises panels 9, 10 with corresponding hinges 11, 12 and 13. The mechanism is shown between the fully folded and deployed positions. Movement can be by means of a bag of compressed air disposed within the mechanism. If the link lengths top and bottom, or at opposite ends, of the plates are different 50 that the respective hinges converge to some point outside the structure, then the holder will rotate about that point. In practice, this rotation corresponds to a roll or yaw movement, or both where both sets of hinges so converge. <IMAGE>
Description
"EJECTION MECHANISM FOR SUBMUNITIONS"
The present invention relates to ejection mechanisms for submunitions and particularly to an ejection mechanism comprising a linkage which enables the imparting of a yaw velocity or roll velocity to the submunition as it is dispensed.
The ejection phase of dispensing a submunition is one element of the total task of achieving a reliable and effective dispersion or ground pattern formation for a given weapon system. The difficulties normally associated with the lateral ejection of a submunition from a dispenser are significantly increased when the length to diameter ratio of the submunition is large, owing to the greater sensitivity of the submunition to both aerodynamic and mechanical forces. In practice the ejection mechanism must be capable of controlling the attitude of the submunition on delivery into an airstream against considerable dispersing forces.
The present invention particularly concerns a mechanism which can, according to circumstances, provide a yaw velocity or roll velocity or both, but may have a more general utility.
According to one aspect of the invention, an ejection mechanism comprising a holder adapted to releasably hold a submunition, the holder being connected to a base frame by way of two assemblies each comprising two members one of which is hinged to the holder along a first axis, the other of which is hinged to the base frame along a second axis and the two members being mutually hinged along a third axis, the hinge axes of one assembly being generally in the same direction and approximately orthogonal with the hinge axes of the other assembly and the hinge axes of at least one assembly converging to a respective common point, whereby on movement of the holder relative to the base frame the holder is constrained to rotate about said point.
According to another aspect of the invention, an ejection mechanism comprising a holder connected to a base frame by means of two approximately orthogonal multiply-hinged linkages of which at least one linkage provides slightly non-parallel coupling whereby as the holder moves relatively to the base frame the said one linkage is constrained to impart a velocity to the holder about either a yaw or roll axis.
The accompanying drawing illustrates the construction and manner of operation of a preferred form of the invention.
In its simplest form the ejector mechanism comprises a panel 1 which is constrained to have rectilinear motion horizontally relative to a base frame 3. The panel 2 has fore and aft parts 2, 2A adapted to hold a submunition lengthwise of the panel 1. At one end of the panel 1 (hereinafter called "holder") there is a linkage comprising two panel members 4 and 5. The member 5 is hinged to the holder 2 along a hinge axis 6; the two members 4 and 5 are mutually hinged by means of a hinge 7 and the member 4 is hinged to the frame 3 by means of the hinge 8. The axes of the hinges 6, 7 and 8 are approximately vertical.
Likewise, a panel member 9 is hinged along the holder 1 by means of a hinge 11 and is hinged to a panel member 10 by means of hinge 12, the member 10 being hinged to the frame 3 by means of a hinge 13.
The axes of the hinges 11, 12 and 13 are approximately horizontal 9i.e. approximately orthogonal to the hinge axes of the panels 4 and 5.
The mechanism thus formed forms a closed kinematic, six piece, chain.
The mechanism is shown in an intermediate state between a closed, or stored state in which the hinged links are fully folded and a deployed state in which the hinged links are fully opened. Means (not shown) may be provided to cause (by, for example, compressed air release) movement of the panel (holder) 1 away from the base frame 3. The means may include a bag, inflatable from a source of compressed air, disposed inside the mechanisms and disposed to act on members of the mechanism or the submunition
If the hinge axes in each set namely the hinges 6, 7 and 8 and 11, 12 and 13 respectively were all parallel within the respective set, then the holder 1 would merely have rectilinear movement relative to the frame 3.
However, if the link lengths top and bottom of the members 4 and 5 are different so that the three hinges 6, 7 and 8 are no longer parallel but converge to some point outside the structure, then as the holder 1 moves outwardly relative to the frame 3, the holder 1 will rotate about that point of convergence.
Likewise, if the link length at one end is longer or shorter than at the other for the memebers 9 and 10, the three horizontal hinges would no longer be parallel and the holder 1 will rotate about the point of convergence. In practice these two rotations may correspond to roll and yaw respectively.
Thus, motion in roll or yaw or both may be imparted.
The mechanism described may be further modified by coupling together two or three linkages so that the aforementioned panel constitutes the base frame of a similar mechanism.
The or each mechanism may be boxed in by fitting multi-hinged panels at both ends and also top and bottom. This requires more room for storage but provides greater rigidity. The hinged panel may fold outwardly of the main panels (1 and 3) if desired.
The panels may be made from carbon fibre sheet with a honeycomb matrix sandwich. Polypropelene strips may be provided to form all the hinges. The panel 1 may be bonded to the holder portions 2, 2a as appropriate.
Claims (2)
1. An ejection mechanism comprising a holder connected to a base frame by means of two approximately orthogonal multiply-hinged linkages of which at least one linkage provides slightly nonparallel coupling whereby as the holder moves relatively to the base frame the said one linkage is constrained to impart a velocity to the holder about either a yaw or roll axis.
2. An ejection mechanism comprising a holder adapted to releasably hold a submunition, the holder being connected to a base frame by way of two assemblies each comprising two members one of which is hinged to the holder along a first axis, the other of which is hinged to the base frame along a second axis and the two members being mutually hinged along a third axis, the hinge axes of one assembly being generally in the same direction and approximately orthogonal with the hinge axes of the other assembly and the hinge axes of at least one assembly converging to a respective common point, whereby on movement of the holder relative to the base frame the holder is constrained to rotate about said point.
2. An ejection mechanism comprising a holder adapted to releasably hold a submunition, the holder being connected to a base frame by way of two assemblies each comprising two members one of which is hinged to the holder along a first axis, the other of which is hinged to the base frame along a second axis and the two members being mutually hinged along a third axis, the hinge axes of one assembly being generally in the same direction and approximately orthogonal with the hinge axes of the other assembly and the hinge axes of at least one assembly converging to a respective common point, whereby on movement of the holder relative to the base frame the holder is constrained to rotate about said point.
Amendments to the claims have been filed as follows 1. An ejection mechanism comprising a holder adapted to releasably hold a submunition and to provide lateral airborne ejection thereof, the holder being connected to a base frame by means of two approximately orthogonal multiply-hinged linkages of which at least one linkage provides non-parallel coupling whereby as-the holder moves relatively to the base frame the said one linkage is constrained to impart a velocity to the holder about either a yaw or roll axis of the submunition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8721100A GB2267557B (en) | 1987-09-08 | 1987-09-08 | Ejection mechanism for submunitions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8721100A GB2267557B (en) | 1987-09-08 | 1987-09-08 | Ejection mechanism for submunitions |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8721100D0 GB8721100D0 (en) | 1993-10-13 |
| GB2267557A true GB2267557A (en) | 1993-12-08 |
| GB2267557B GB2267557B (en) | 1994-04-20 |
Family
ID=10623449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8721100A Expired - Lifetime GB2267557B (en) | 1987-09-08 | 1987-09-08 | Ejection mechanism for submunitions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2267557B (en) |
-
1987
- 1987-09-08 GB GB8721100A patent/GB2267557B/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| GB2267557B (en) | 1994-04-20 |
| GB8721100D0 (en) | 1993-10-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PE20 | Patent expired after termination of 20 years |
Effective date: 20070907 |