The present invention relates to a missile housing-transportation-launch assembly, and to a ground launcher featuring such missile housing-transportation-launch assemblies.
Areas subject to aircraft or missile attack are defended using stationary or self-propelled vertical ground launchers equipped with medium-range munition-configured missiles, to which the following description refers purely by way of example.
Known mobile ground launchers of the type described above are unsatisfactory in terms of ease of transport and mobility, as well as in terms of operating efficiency and dependability.
In particular, transportation of known launchers, especially by military aircraft (e.g. C-130s), involves dismantling the launcher, thus preventing immediate use on arrival.
Moreover, mobile launchers of the above type cannot be reloaded independently or quickly and easily, especially at the launch site. Even in the case of more evolved launchers employing munition-configured missiles, i.e. supplied complete with a launch container, the launcher or missile battery is normally provided with a reloading unit, which impairs mobility, ease of transport and immediate deployment, creates logistic problems, and increases cost.
The cause of the above drawbacks substantially lies in the considerable weight and size of known ground launchers.
Known launchers are described, for example, in U.S. Pat. No. 6,526,860, which describes a missile launching cell comprising an inner lining structure of composite material with surfaces designed to guide the missile during launching; and an outer casing with an end portion in the form of an integrated compensating chamber. Though cheap and lightweight, the launching cell can only be used once, and fails to safeguard the missile against accidental shock and vibration. In other words, the cell described performs no damping function, so that external forces are transferred directly to the missile.
American U.S. Pat. No. 6,755,111, on the other hand, describes a complex launcher, which differs from the object of the present invention by comprising a compensation chamber and missile rocket combustion gas exhaust conduits, and which has cavities for receiving missiles housed in launching cells.
American U.S. Pat. No. 6,584,881 describes a missile launch module that can be transported on military ground vehicles, and which, unlike the present invention, is connected in a fixed, normally vertical, position to the base structure.
American U.S. Pat. No. 6,584,882 describes a self-sufficient missile launching cell with exhaust conduits connected to the compensation chamber. The conduits guide the rocket combustion gases, deflected from the compensation chamber, to the front end of the launching tube, which also acts as a storage container.
U.S. Pat. No. 6,311,604, on the other hand, describes a breakthrough hatch, substantially designed to close the front end of a launching tube.
It is an object of the present invention to provide a housing-transportation-launch assembly for vertical-launch missiles, designed to provide a straightforward, low-cost solution to the aforementioned drawbacks, and which at the same time is highly efficient and dependable.
According to the present invention, there is provided a housing-transportation-launch assembly for a missile, the assembly comprising an outer casing housing said missile; the casing being made of metal and comprising a lateral wall, a front breakthrough wall, a jet deflector connected integrally to a rear portion of said lateral wall, and a rear breakthrough wall closing an outlet of said jet deflector and which is broken by the exhaust gases of said missile.
The jet deflector of the assembly defined above preferably comprises a deflecting surface for guiding an exhaust jet in an exhaust direction crosswise to a longitudinal axis of said casing, and directing the exhaust jet far away from said casing of the housing-transportation-launch assembly.
The present invention also relates to a ground launcher comprising such missile housing-transportation-launch assemblies.
According to the present invention, there is provided a ground launcher comprising a self-propelled structure; a supporting structure loaded with a number of housing-transportation-launch assemblies as claimed in the attached Claims, and fitted adjustably to said self-propelled structure; and actuating means for moving the supporting structure between a loading position and a launching position; said supporting structure comprising first locating and retaining means which engage second locating and retaining means on each of said housing-transportation-launch assemblies.
The present invention also relates to a method of producing a missile housing-transportation-launch assembly.
According to the present invention, there is provided a method of producing a casing, in particular for housing, transporting, and launching missiles; the method comprising the steps of forming a number of longitudinal lateral panels; and being characterized by also comprising the steps of forming at least one pair of first connecting members for connecting said lateral panels to one another, and at least one pair of second connecting members for connecting said lateral panels and differing constructionwise from said first connecting members; and stably connecting the lateral panels to one another by means of said first and second connecting members; connection of said lateral panels comprising the steps of forming at least two distinct portions, at least one of which comprises at least two lateral panels connected to each other by said first connecting members; and stably welding said portions to each other by means of said second connecting members.
A non-limiting embodiment of the invention will be described by way of example with reference to the accompanying drawings, in which:
a and 28b show two cross sections along lines A-A and B-B respectively in
Number 28 in
With reference to
In the embodiment described, front breakthrough hatch 5 is shattered by the nose of missile 21 as it is launched, and, for this reason, is of minimum break resistance when stressed from inside the casing, i.e. by the nose of missile 21, to oppose minimum resistance to expulsion of missile 21. Conversely, the front breakthrough hatch has a high break resistance when subjected to stress or forces from outside, so as to withstand external forces (wind, blast, pressure, and temperature caused by the launching of adjacent missiles 21). Rear breakthrough hatch 6, on the other hand, is shattered by the exhaust gas produced by the engine of missile 21, is of minimum resistance when stressed from inside casing K, to allow unimpeded outflow of the exhaust gas from the engine of missile 21, and is of greater resistance to external stress, such as wind, blast, pressure, and temperature caused by the launching of adjacent missiles 21.
With reference to
As shown in
For this purpose, each casing K has a locating device and a releasable—in this case, manually operated —connecting device. In the example described, the locating device comprises two pairs of locating pins 3, which project from the same wall or panel 1 (
With reference to
With reference to
When levers 11 are operated, rods 12 translate, triangular cam members 14 are moved longitudinally, and the four rods 16 slide inside guides 15 to translate wedges 10 in a direction perpendicular to the translation direction of rods 12.
When two assemblies 28 are placed one on top of the other (as shown, for example, in
As designed, the devices described therefore provide for stacking various assemblies 28 in given relative positions, and for locking them stably to one another in fixed, one-only, relative positions (
According to the invention, assemblies 28 are preferably stacked on a platform 19, which supports assemblies 28, performs both a transportation and launching function, and, together with assemblies 28, forms part of a ground launcher. Platform 19 is shown in
To position groups 38, and therefore assemblies 28, in a given one-only position with respect to platform 19, and to lock groups 38 releasably to platform 19, platform 19 is fitted integrally with a number of locating pins 3 arranged in pairs to engage seats 8 in the casings K contacting the top supporting surface of platform 19. Once positioned by pins 3 inserted inside seats 8, the assembly 28 contacting the platform is made integral with platform 19 by the wedge locking device described above and housed inside casing K of the assembly 28 contacting platform 19.
In
As shown in
When the engine of missile 21 reaches a given thrust, e.g. 1000 daN, break-off member 33 breaks off to release missile 21.
The maximum-thrust retaining device provides for retaining the missile even when the engine is at maximum thrust, normally 6000 daN. The maximum-thrust retaining device is therefore a safety device to prevent the missile being launched in the event of involuntary ignition of the engine. Prior to voluntary ignition of the engine of missile 21, motor 34 rotates member 35, which releases and ensures correct launching of missile 21 following break-off of break-off member 33.
As shown in
In addition to guiding missile 21 at the launching stage, the four rear guides 31 are also independent to detach rapidly from missile 21 once outside casing K, and, like guides 30, provide for protecting missile 21 and its delicate component parts from shock and vibration during transport. Both the front and rear guides are also designed to reduce the forces transmitted by the missile to the casing at the launching stage.
Angle members 2 are formed from an extruded section having the cross section shown in
As shown in
Angle members 41 are formed in the steps shown in
Right-angle members 2, 41 are used to form square- or rectangular-section casings; and generic-angle members 2, 41 are used for generic, e.g. hexagonal, sections.
With reference to
Each assembly 28 described is therefore a munition-configured-missile type, i.e. complete with a container for housing, transporting, and launching the missile housed inside.
The design characteristics of each assembly 28 in general, and of casing K in particular, therefore pose no limits as to the form and geometry of either assembly 28 or groups 20 or 38, so that a larger number of assemblies 28 can be accommodated in a given volume as compared with known solutions. The design characteristics of assemblies also make them much lighter, compact, and stronger than known solutions, which is mainly due to the fixed- or preferably variable-pitch truss design of the profiles used for the main structures.
What is more, assemblies 28 described are highly efficient, reliable, and easy to use, mainly on account of the jet deflector incorporated in or fitted to each missile housing-launch casing K. As stated, the missile engine exhaust gas deflector provides for directing the exhaust gas in a preferential direction, to prevent it affecting the sensitive parts of the launcher or anything adjacent to the launcher. Providing a jet deflector for each disposable housing-transportation-launch assembly 28 enables a considerable reduction in weight and size, and provides for greatly increasing reliability (by eliminating the need for actuating devices) and flexibility as compared with known solutions, and particularly as compared with conventional use of a large, heavy, mobile jet deflector integrated in the launcher structure and catering to all the missiles on the launcher.
The efficiency, reliability, and safety of assemblies 28 are further enhanced by the guide assembly inside casing K, and by the minimum- and maximum-thrust retaining devices. The guide assembly, in fact, clearly provides, on the one hand, for maintaining a given trajectory at the launch stage, and, on the other, for safeguarding against external shock and vibration both during transport and at the launch stage. Whereas the retaining devices safeguard against inadvertent launching, and are of straightforward design for light weight and compactness.
The ground launcher described can be set independently to the vertical launch position, and at the same time is highly mobile, easy to transport, and efficient (can be rolled on/off small aircraft, such as C-130s, and can be reloaded with no external equipment required).
As regards outer casings K, the manufacturing method described provides for achieving performance unobtainable by currently known equipment. The truss design cross section of lateral panels 1 of the casing, in fact, converts stress transmitted to the casing into substantially tensile or compressive stress, thus maximizing structural use of the materials. The variable pitch of the trusses depends on the variable bending moment to which the cross sections are subjected, and is so selected (taking into account local pressure-induced stress on the inner surface) that the material is uniformly stressed. This, together with laser or equivalent welding, provides for obtaining extremely thin structures, which cannot be obtained using conventional manufacturing methods (e.g. extrusion), but which are achievable using the aluminium alloy welding method.
Releasably connecting assemblies 28 in fixed, one-only relative positions provides for forming “multitube” assemblies, in which assemblies 28 are interchangeable, thus simplifying replacement at the launch site.
Finally, using a rear breakthrough wall together with a jet deflector solves the problems posed by an integrated compensation chamber, as described in U.S. Pat. No. 6,526,860.
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