Ammunition and explosives – Having reaction motor – Having separation means
Patent
1995-12-05
1997-10-21
Carone, Michael J.
Ammunition and explosives
Having reaction motor
Having separation means
102378, 102489, 244 322, F42B 1258
Patent
active
056799195
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a method and an apparatus for transferring warheads provided with their own target seekers and first discharged into ballistic trajectories in a non-rotary state, in which the warhead and target seeker are inactivated to a second, fully developed rotary state. During the second downward state of their trajectory the warhead is spun about its major axis of inertia to a predetermined speed, given a fall velocity which is predetermined during such search and effect phase determined by specific aerodynamic brake surfaces which are activated. In its stable fall trajectory, with the center of the warhead and main axes of inertia directed in a predetermined manner in relation to the fall trajectory at the same time as the target seeker is activated to seek an adjacent target area, and the effective charge of the warhead is made ready, in the event of identification of a target by the target seeker, to be discharged in the correct search direction to attack the target.
The warhead referred to here is, therefore given a complex trajectory in which the problem resides in imparting to the warhead, within the shortest possible launch trajectory, a sufficiently long fall trajectory for its seek-and-effect phase concurrently with the non-rotary state of the warhead, before its active seek-and-effect phase has been commenced, must have been transferred to a rotary state and given a stable fall trajectory for which a plurality of specific requirements must be established in respect to the direction and rotation of the warhead.
In warheads of similar type, it is previously known to releasably house them in a protected canister up to that point in time when their target seeker and aerodynamic brake surfaces are to be activated and then, with the aid of a pyrotechnic charge, eject the warhead out of the canister, whereupon target seeker and brake surfaces are flipped out by spring force and/or under the action of the inertia forces and aerodynamic forces acting on the warhead.
The problem which has been solved by means of the present invention is, in a continuous and unbroken sequence, to impart to the warhead its above-mentioned rotation and, in connection therewith, to eject it out of its protective canister.
As its search-and-effect phase is initiated, the warhead functions in basically the same manner as corresponding warheads of previously known type which are directed to a relevant target area by a rotation-stabilized projectile such as an artillery shell or the like and from which the complete warhead is separated when the projectile reaches the immediate proximity of the target area in order thereafter to be retarded to the desired values of rotation and fall velocity, and is given the same type of stable fall trajectory and general direction as the warhead according to the present invention. In those cases where the complete warhead is transported to its target area by a rotary projectile, the entire system will, however, be somewhat simpler since it is then primarily a matter of retarding the rotation and fall velocity of the warhead released from the vehicle (the shell) to desired levels, and of controlling the rotation of the warhead so that this takes place about its major axis of inertia which must make a predetermined angle with the angle of effect of the warhead.
The vehicle (hereinafter designated as a capsule) which is referred to in this context may, for example, consist of a cruise missile with its own target seeker and carrying large number of complete warheads which it may eject when its own target seeker has identified the target, or, alternatively, the capsule may consist of a pair of a permanent booby-trap mining or the like.
As already mentioned warheads of the type under consideration here will, as soon as they have reached the seek-and-effect phase, function in exactly the same manner irrespective of whether they were transported to the target area by a rotary vehicle such as an artillery shell or by a capsule of another type from which
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Axinger Jan
Holm Anders
Jarnryd Kenneth
Bofors AB
Carone Michael J.
Montgomery Christopher K.
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