Ordnance – Waging war
Reexamination Certificate
1999-09-21
2001-06-12
Jordan, Charles T. (Department: 3644)
Ordnance
Waging war
C089S036170, C102S211000, C102S473000
Reexamination Certificate
active
06244156
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention concerns a method of protecting an object from the effect of a high-speed projectile, in particular an armoured vehicle from the threat of KE fin-stabilised projectiles.
2. Discussion of the Prior Art
As a protective measure in relation to projectiles of that kind, which are also referred to as KE penetrators, it is known for example from DE 41 22 622 A1 for the main armouring of the object to be protected to be additionally covered with a reactive armouring comprising plates which are backed with explosive. Sensor means are used to ascertain which region of the object to be protected is threatened by the oncoming projectile in order to fling a plate from that region towards the projectile and thereby disturb at least the kinematics but generally also the kinetics of the attacker so that even in the event of a hit it still only produces a harmless residual effect because for example the fin-stabilised projectile hits the object to be protected when it is no longer in the proper attitude in the longitudinal direction but at an angle thereto and therefore hits the object laterally without a high level of penetration force.
In the case of the reactive armouring known from DT 977 984 the explosive-accelerated plate is no longer hurled towards the approaching projectile but upon impact thereof is displaced transversely to the impact direction in order to deflect the direction of action.
A disadvantage with reactive armouring which is operative in itself is the high additional loading on the object to be protected, more specifically in static terms due to the mass of the reaction plates and in dynamic terms due to the reaction effect in the event of the explosive-accelerated motion of a plate. In addition, when the objects to be protected are vehicles, there is the disadvantage that for reasons relating to design configuration the propulsion region (tracks or wheels at the front) remains substantially unprotected. That represents a particular risk aspect precisely in the main direction of threat to a fighting vehicle. A further disadvantage is that, once a reaction plate has been triggered off, it leaves behind an unprotected area because such a gap can only be closed again in the base magazine after restoration of the plate holders by installing a new explosive-backed reaction plate.
SUMMARY OF THE INVENTION
The object of the present invention is therefore that of providing protection from high-speed projectiles such as in particular KE penetrators, which makes fewer demands and causes fewer stresses on the object to be protected and which after it has been triggered off can be more easily reactivated again and which in particular exerts an optimum disturbance effect on the attacking projectile.
In accordance with the invention that object is attained in that the rapidly approaching projectile, in particular an inertia projectile which is stabilised by means of tail fins, is deflected out of the attack trajectory or at least pivoted out of the attack direction as a result of transverse force effect behind its centre of gravity; more specifically, by a blast grenade or shell being launched towards the attacking projectile from a launch barrel which can be reloaded without problem, on board the object to be protected, the blast shell having an undirectedly acting and therefore very inexpensive warhead which is fired at the optimum approach time to the attacking projectile in order to liberate a gas fumes and reaction pressure wave towards the projectile to be defended against. That time of effect is the optimum when the blast action takes its effect not principally and in particular not firstly on the front region, but rather on the tail region of the attacking projectile, with its tail cross-section which is enlarged by virtue of the presence of the stabilisation vanes. For, otherwise a deflection effect which already produced in the front region could be reversed again by a transverse loading which is thereupon also applied to the tail region.
REFERENCES:
patent: 4215630 (1980-08-01), Hagelberg et al.
patent: 5400688 (1995-03-01), Eninger et al.
patent: 5464174 (1995-11-01), Laures
patent: 5495787 (1996-03-01), Boyer, III
patent: 27 19 150 C1 (1987-03-01), None
patent: 38 31 329 A1 (1990-05-01), None
patent: 40 08 395 A1 (1991-09-01), None
patent: 41 22 622 A1 (1993-01-01), None
patent: 195 43 489 C1 (1997-02-01), None
Ertel Helmut
Klee Christian
Steuer Raimar
Weihrauch Gunter
Best Christian M.
Diehl Stiftung & Co.
Jordan Charles T.
Scully Scott Murphy & Presser
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