Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
  • F41H5/00—Armour; Armour plates
  • F41H5/06—Shields
  • F41H5/12—Shields for smallarms; for light-rocket launchers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
  • F41H5/00—Armour; Armour plates
  • F41H5/013—Mounting or securing armour plates
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
  • F41H5/00—Armour; Armour plates
  • F41H5/02—Plate construction
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
  • F41H5/00—Armour; Armour plates
  • F41H5/02—Plate construction
  • F41H5/023—Armour plate, or auxiliary armour plate mounted at a distance of the main armour plate, having cavities at its outer impact surface, or holes, for deflecting the projectile

Definitions

• BACKGROUND OF THE INVENTION RPG defeat mechanisms include slat armor, strangulation nets, and hard point nets. See, for example, German Patent DE 69.1, 067, ' U.S. Patent No. 1,385,897;
• an RPG defeat method comprising placing a foam body on or in proximity to a vehicle or structure.
• the method includes displacing a plug of the foam body allowing an RPG sensor to enter the foam body without the sensor signaling the RPG detonator.
• the foam body short circuits the electrical connection between the RPG sensor and detonator before the RPG sensor strikes the vehicle or structure.
• the foam body is chosen to have density sufficiently low to allow the RPG sensor to enter the foam body without the sensor signaling the RPG detonator.
• the foam body is chosen to have a density/strength sufficiently high for the foam body to short circuit the electrical connection between the RPG sensor and detonator before the RPG sensor strikes the vehicle or structure. If the foam body is on the vehicle or structure, the method may further include choosing a sufficiently thick foam body for the foam body to short circuit the electrical connection between the RPG sensor and detonator before the RPG sensor strikes the vehicle or structure. If the foam body is spaced from the vehicle or structure the method may further include choosing a sufficient spacing for short circuiting the electrical connection between the RPG sensor and detonator before the RPG sensor strikes the vehicle or structure.
• the method may further include encapsulating the foam body. Also, the foam body is mounted in a framework secured to the vehicle or structure.
• an RPG defeat method comprising placing a foam body on or in proximity to a vehicle or structure. A plug of the foam body is displaced allowing an RPG sensor to enter a resulting channel in the foam body without the sensor signaling the RPG detonator. The foam body short circuits the electrical connection between the RPG sensor and detonator before the RPG sensor strikes the vehicle or structure by deforming the RPG nose cone as it enters the foam body.
• an RPG defeat system comprising a foam body on or in proximity to a vehicle or structure.
• the foam body is configured for displacement of a plug of the foam body allowing an RPG and sensor to enter the foam body without the sensor signaling the RPG detonator.
• the foam body is further configured to short circuit the electrical connection between the RPG sensor and detonator before the RPG sensor strikes the vehicle, or structure.
• Fig. 1 A is a schematic cross sectional side view showing an example of an RPG defeating panel in place on a vehicle or structure;
• Fig. IB is a schematic cross-sectional side view showing an example of an RPG defeating panel in a spaced relationship with respect to a vehicle or structure;
• Figs. 2A-2D are schematic cross-sectional side views showing an example of an RPG defeat method in accordance with an example of the invention
• Fig. 3 is a schematic three dimensional partially cut away view of an example of an RPG defeating encapsulated body for use in connection with a vehicle or structure;
• Fig. 4 is a schematic three dimensional view of an example of an encapsulated RPG defeating body more particularly adapted to use in protecting structures;
• Fig. 5 is a flow chart depicting the primary steps associated with an RPG defeat method in accordance with embodiments of the invention.
• Fig. 6 is a schematic cross-sectional side view showing an example of an RPG defeating panel including subpanels or regions of different density
• Fig. 7 is a schematic view showing the RPG defeating panel of Fig. 6 with a plug readwardly displaced creating a channel for accepting the nose trigger of an RPG;
• Fig. 8 is a schematic view of an example of an RPG defeating panel including another kind of armor disposed between the target and the porous RPG defeating panel.
• porous (e.g., foam) body 10 may be secured on an external portion of a potential target such as vehicle or structure 12 (such as a vehicle door) or the foam body 10, Fig, IB may be spaced from vehicle or structure 12 using, for example, a framework structure including fasteners 14 extending through foam body 10 and secured to vehicle or a structure 12.
• a potential target such as vehicle or structure 12 (such as a vehicle door) or the foam body 10
• Fig, IB may be spaced from vehicle or structure 12 using, for example, a framework structure including fasteners 14 extending through foam body 10 and secured to vehicle or a structure 12.
• Foam body 10, Fig. 2A is designed to allow RPG piezoelectric sensor fuse (trigger) 20 in or at the nose of the RPG to enter a channel 1 1 in the foam body 10 formed by displacing a plug 28, Fig. 2B of the foam body 10 material without the piezoelectric sensor 20 being strained and thus signaling the RPG detonator via a voltage.
• foam body 10 has a density sufficiently low such that the RPG piezoelectric sensor is not triggered as plug 28 is pushed out of foam body 10 and the nose of the RPG and the sensor enters channel 1 1, Fig. 2C.
• the shock wave 13 formed ahead of sensor 20 is believed to dislodge foam plug 28 and form channel 11 so RPG sensor 20 is not strained by any foam material as shown in Fig. 2C.
• the nose of the RPG may also dislodge foam plug 28.
• the foam body 10, Fig. 2D is designed to have a sufficient compressive strength to short circuit the electrical connection between the RPG sensor and detonator before the RPG sensor strikes the vehicle or structure the foam body is protecting.
• foam body 10 in the region around the channel 1 1 is sufficiently strong to deform one or more portions of nose cone 18 as shown at 30a and 30b as the nose cone enters the foam body via channel 1 1.
• the result is fuse disruption and defeating (duding) the RPG.
• the RPG nose sensor now strikes the target (vehicle or structure) and generates a voltage, said voltage will not reach the detonator of the RPG because of the deformed ogive.
• the RPG shape charge will not detonate.
• the foam body is also thick enough and/or spaced far enough away from the intended target so that the RPG fusing is disrupted before the RPG trigger strikes the target. If the foam body is located on the vehicle or structure it may need to be thicker (e.g., 5-6" (127-152 mm) thick) than if the foam body is spaced from the vehicle or structure to allow for nose cone deformation and disabling of the RPG before the RPG piezoelectric sensor strikes the vehicle or structure. If, for example, the foam body is spaced from the vehicle or structure by 1-3" (25-76 mm), the foam body may be 4" thick. The thickness of the porous body may range from about 1 " thick to about 16" (125 to 400 mm) thick.
• a foam body panel 10, Fig. 3 for use on a vehicle may include an environmental cover material such as encapsulant 40 for protection against the elements.
• encapsulant 40 is a polymer or polyurea material typically used in the lining of pickup truck beds and industrial equipment.
• foam brick 10 for use in front of structures such as buildings also includes encapsulant 40.
• One preferred foam body material is a styrene acrlonitrile (SAN) co-polymer foam. See U.S. Patent No. 8,324,287 incorporated herein by this reference.
• SAN styrene acrlonitrile
• a closed cell or open cell foam may be used.
• Other porous materials may be used (e.g., aluminum foams).
• a SAN foam body 1-16 (25-400 mm) thick was spaced 0-6" (0-152 mm) from a metal plate representing an RPG target.
• the foam body had a density range of 1 lbs/ft 3 to 30 lbs/ft 3 , a compressive strength of 100-500 psi (0.7-3.4 Mpa) , a compressive modulus (ASTM D1621-1973) of 10-25 ksi (69-172 Mpa), a shear strength of 150-250 psi (1.0-1.7 Mpa), a shear modulus of 4-9 ksi (27.8-62.1 Mpa), a tensile strength of 200-400 psi (1.4-2.8 Mpa), a tensile modulus of 12-29 ksi (82.7-200 Mpa) and a thermal conductivity of 0.01-0.1 W/mK and HDT of 85°-150°C. .
• RPG test shots were fired at the test structure and in each case the RPG was disabled by the foam body and did not detonate. The foam body caused fuse disruption and a defeat of each RPG.
• RPG defeat mechanisms include the simplicity of the RPG defeating foam, its light weight, buoyancy, and ease of implementation.
• the SAN foam disclosed above can be formed into different shapes.
• porous bodies may also be used provided the armor does not cause the RPG piezoelectric sensor to trigger the RPG detonator and still the armor deforms the RPG nose cone sufficiently to short circuit the electrical connection between the RPG sensor and the detonator before the sensor strikes its intended target.
• the foam material used has properties which allow the RPG to dislodge a plug of the foam material creating a channel just large enough in diameter for the RPG nose and sensor to enter.
• the foam body alone defeats the RPG.
• the RPG nose trigger enters a channel in the porous panel, step 52.
• the panel may be a foam block placed on or proximate the target.
• the channel in the panel is formed by a plug fully or partially displaced from the panel. Due to the characteristics of the panel, the nose trigger is not strained sufficiently to generate a voltage, step 54.
• the RPG continues to penetrate the panel, step 56 and due to the characteristics of the panel the RPG ogive is deformed by the material of the panel short circuiting the voltage pathway between the RPG nose trigger and the RPG detonator (typically located at the rear of the RPG), step 58.
• the RPG nose trigger does strike the target, step 60 and is strained sufficiently to generate a voltage. But, since the RPG ogive is deformed, the voltage does not reach the RPG detonator and the RPG shape charge is not detonated.
• the RPG defeating panel has a sufficiently low density to be pierceable by an RPG sensor without the RPG sensor being strained. Still, the foam body has a compressive strength sufficient to deform the RPG ogive short circuiting the voltage pathway from the sensor to the RPG detonator. Furthermore, the panel has a sufficient thickness and/or spacing from the target to deform the RPG short circuiting the voltage pathway from the sensor to the RPG detonator before the RPG sensor strikes the target and is strained creating a voltage.
• a porous RPG defeating shield 10' includes subpanels or regions 70a, 70b of varying density.
• subpanel or region 70a is softer (e.g., a density less than 10 lbs/ft 3 (160 Kg/m 3 )) and the subpanel or region 70b is more rigid (e.g., a density greater than 20 lbs/ft 3 (320 Kg/m 3 )).
• the softer subpanel or region 70a allows the RPG nose trigger to move a plug 28, Fig. 7 of the foam material rearward and allows the RPG trigger to enter the shield via the resulting channel 11 without straining the trigger.
• Softer subpanel or region 70a also begins deforming the RPG ogive and subpanel or region 70b then further deforms the RPG ogive short circuiting the voltage pathway from the RPG trigger to the RPG detonator.
• the rear region or subpanel 70b may have a lower density than the front region or subpanel.
• integrated rear armor 80, Fig. 8 may be used between the target 12 and the porous body' 10".
• Ceramic tiles, for example, may be used to protect against projectiles other than RPGs.
• the target may be one or more panels of an amphibious vehicle.
• the porous body provides buoyancy as well as protection against RPG threats (and, optionally, protection against other projectiles).

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Publications (2)

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• 2016
  • 2016-11-18 PL PL16866767T patent/PL3377843T3/pl unknown
  • 2016-11-18 US US15/530,239 patent/US20180112955A1/en not_active Abandoned
  • 2016-11-18 EP EP16866767.3A patent/EP3377843B1/de active Active
  • 2016-11-18 WO PCT/US2016/000130 patent/WO2017087010A2/en active Application Filing

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