Abstract:
The present disclosure generally relates to an improved penetrator design and associated arming generator relocator adaptor. In some embodiments, the arming generator relocator adaptor is positioned external to the penetrator, thereby removing the need to mount the FZU inside the warhead or include traditional internal plumbing. The arming generator relocator adaptor allows the FZU to be rotated to an optimal position to arm the penetrator. While the improved penetrator design and arming generator relocator adaptor can be used independently of each other, in the preferred embodiment, they are utilized together.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to, and the benefit of, U.S. Application Ser. No. 62/126,203 titled “Arming Generator Relocator Adaptor”, filed Feb. 27, 2015, the entire contents of which are herein incorporated by reference. 
    
    
     STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
     This invention was made with government support under Contract Number W15QKN-14-9-1001-DOTC-14-01-INIT486 awarded by the United States Air Force. The government has certain rights in the invention. 
    
    
     BACKGROUND OF THE INVENTION 
     Field and Background of the Invention 
     The present invention is in the technical field of penetrating weapons (or warheads), and more specifically to an improved penetrator design and arming generator relocator adaptor. Most legacy penetrators have a feature known as a charging well, which is essentially a component which mounts inside a very large hole in the warhead casing to locate and mount a fuze arming generator (FZU). In addition to the charging well, plumbing components are used to channel FZU wires from the charging well, through the interior portion of the warhead casing through the explosive material aft to the fuze well. This arrangement has been identified to cause several issues, including but not limited to: (a) stress concentrations in the warhead casing, causing warhead casing failure/breakage during the penetration event; (b) plumbing components being ripped loose and/or moving inside the warhead during a penetrating event, leading to a premature reaction of the explosive material and failure of the munition; and (c) the charging well can be ejected, exposing explosive material to the severe friction and shock environment of the penetration event, leading to a premature reaction of the explosive material and failure of the munition. Because of these failure modes, improvements to the penetrating warheads are needed. 
     SUMMARY OF THE INVENTION 
     The present invention improves upon the existing warhead designs, and reduces or eliminates many of the failure modes of existing warhead designs. In some embodiments, the invention involves a new design of a penetrator (or warhead) that removes the internal plumbing, the charging well, and the charging well hole in the casing. In some embodiments, the invention involves an Arming Generator Relocator Adaptor (“AGRA”). In order for the system to still function with existing FZU and fuze systems, the AGRA was designed to relocate existing FZU&#39;s to an alternate location external to the warhead while retaining FZU function and wire routing to the fuze. 
     In some embodiments, the new penetrator design can be used with alternative FZU designs (other than with the disclosed AGRA). In some embodiments, the disclosed AGRA can be used with other alternative penetrator designs. In other embodiments, and in the preferred embodiment, the disclosed AGRA and new penetrator design are used together. 
     In one embodiment of the invention, a fuze arming generator (“FZU”) mounting module (also referred to herein as the “AGRA module”) is provided comprising, (a) a chassis having a forward end, an aft end, a center arm, and openings configured to receive an adaptor pin; (b) a cam arm connected to the chassis, said cam arm having a forward end, an aft end, first recess position depression, second recess position depression, and dividing ridge between the first recess position depression and second recess position depression; and (c) a FZU adaptor comprising a cavity, openings to receive a safety hinge pin, and at least one FZU adaptor pin on the FZU adaptor exterior, wherein the FZU adaptor is connected to the chassis by a safety hinge pin through its openings, wherein the FZU adaptor is rotatable about the axis of the safety hinge pin, and wherein the FZU adaptor pin is moveable between the cam arm first recess position depression and second recess position depression when the FZU adaptor is moved from a stowed position to an open position. In some embodiments, the FZU adaptor cavity is threaded. In some embodiments, the FZU adaptor further comprises adaptor holes in the bottom to receive arming wires. The chassis may also have securing holes at its forward end and aft end. In some embodiments, the forward end of the chassis and the forward end of the cam arm are connected, and wherein the connection between the aft end of the chassis and aft end of the cam arm comprises springs and spring pins. The FZU adaptor may be rotatable at least about 90 degrees, and configured such that the FZU adaptor is substantially horizontal in a stowed position and substantially vertical in an open position. In some embodiments, the FZU mounting module is secured to a penetrator hardback. In some embodiments, the invention further comprises a FZU seated in the FZU adaptor cavity. 
     In other embodiments, the FZU mounting module is provided comprising, (a) a chassis; (b) a cam arm connected to the chassis; and (c) a FZU adaptor comprised of a cavity configured to receive a FZU and at least one FZU adaptor pin on its exterior surface, wherein the FZU adaptor is attached to the chassis and is rotatable about an axis defined by the connection between the chassis and FZU adaptor, and wherein the FZU adaptor pin is seated in a channel formed between the connection between the chassis and cam arm. In some embodiments, the internal cross section of the FZU adaptor cavity is circular in shape and threaded. In some embodiments, the cam arm comprises a first recess position depression and a second recess position depression, and wherein the FZU adaptor pin is seated in the first recess position depression in a stowed position and the second recess position depression in an open position. In some embodiments, the connection between the chassis and cam arm comprises springs and spring pins. In some embodiments, the chassis and cam arm are connected at their forward ends. In some embodiments, the FZU adaptor has flat exterior faces. In some embodiments, the FZU adaptor is rotatable at least about 90 degrees, and configured such that the FZU adaptor is substantially horizontal in a stowed position and substantially vertical in an open position. In some embodiments, the FZU mounting module is mounted on the exterior of a penetrator. 
     In other embodiments, a FZU mounting module is provided comprising (a) a chassis having a forward end, an aft end, and openings configured to receive a safety hinge pin; (b) a FZU adaptor attached to the chassis by a safety hinge pin, and rotatable about an axis of the safety hinge pin, the FZU adaptor having a threaded cavity having an internal circular cross section, and wherein the FZU adaptor is substantially horizontal in a stowed position and substantially vertical in an open position, and wherein the chassis is attachable outside of a penetrator casing. In some embodiments the FZU adaptor further comprises at least one FZU adaptor pin on its exterior, and the FZU adaptor pin is seated in a first position in a channel in a stowed position and a second position in the channel in the open position. In some embodiments, the FZU adaptor is rotatable at least about 90 degrees, and configured such that the FZU adaptor is substantially horizontal in a stowed position and substantially vertical in an open position. In some embodiments, the FZU adaptor has flat exterior faces. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       It should be noted that identical features in different drawings are generally shown with the same reference numeral. Various other objects, features and attendant advantages of the present invention will become fully appreciated as the same becomes better understood when considered in conjunction with the accompanying drawings. 
         FIG. 1  shows the cross section of a legacy penetrator. 
         FIG. 2  shows the cross section of one embodiment of an improved penetrator design of the present invention. 
         FIG. 3  shows one embodiment of the AGRA assembly positioned external to the improved penetrator design. 
         FIG. 4  shows another view of the embodiment of the AGRA assembly shown in  FIG. 3  positioned external to the improved penetrator design. 
         FIG. 5  shows one embodiment of various components of one embodiment of the AGRA assembly. 
         FIG. 6A  shows one embodiment of the AGRA module. 
         FIG. 6B  shows a closer view of the FZU adaptor in  FIG. 6A . 
         FIG. 6C  shows a closer view of the chassis and associated components in  FIG. 6A . 
         FIG. 6D  shows a closer view of the cam arm and associated components in  FIG. 6A . 
         FIG. 7  shows a view of one embodiment of the AGRA module, in a closed, or stowed position, being triggered by a lanyard upon release of the penetrator from its attachment or deployment system. 
         FIG. 8  shows another view of the AGRA module of  FIG. 7  after being triggered, in its open position. 
         FIG. 9  shows a close up of one embodiment of the FZU adaptor removed from the AGRA module showing the arming cable interface. 
         FIG. 10  shows one embodiment of the AGRA module in its stowed configuration, and surrounded by a hardback. 
         FIG. 11  shows one embodiment of the AGRA module in its deployed configuration, and having an inserted FZU. 
         FIG. 12  is a side view of one embodiment of the AGRA module in its stowed (or closed) position. 
         FIG. 13  is a back view (or aft end) of one embodiment of the AGRA module in its stowed position. 
         FIG. 14  is a perspective top view of one embodiment of the AGRA module in its stowed position. 
         FIG. 15  is a front view (or forward end) of one embodiment of the AGRA module in its stowed position. 
         FIG. 16  is a perspective bottom view of one embodiment of the AGRA module in its stowed position. 
         FIG. 17  is a perspective bottom view of one embodiment of the AGRA module in its stowed position. 
         FIG. 18  is a perspective top view of one embodiment of the AGRA module in its stowed position. 
         FIG. 19  is a partial perspective view of one embodiment of the AGRA module with the chassis removed. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       FIGS. 1 through 19  illustrate various views and embodiments of the present invention. Various embodiments may have one or more of the components outlined below. Generally, the following reference numbers are used for the following components: 
     
       
         
               
               
               
             
           
               
                   
               
             
             
               
                   
                 AGRA assembly 
                 1 
               
               
                   
                 AGRA Module 
                 2 
               
               
                   
                 Forward Arming Wire Manifold 
                 3 
               
               
                   
                 Arming Wire Conduit 
                 4 
               
               
                   
                 Aft Arming Wire Manifold 
                 5 
               
               
                   
                 FZU Adaptor 
                 6 
               
               
                   
                 Chassis 
                 7 
               
               
                   
                 Cam Arm 
                 8 
               
               
                   
                 Safety Hinge Pin 
                 9 
               
               
                   
                 Cam Hinge Pin 
                 10 
               
               
                   
                 Spring Pin 
                 11 
               
               
                   
                 Spring 
                 12 
               
               
                   
                 Spring Cup 
                 13 
               
               
                   
                 Detent Spring Pin 
                 14 
               
               
                   
                 Washer 
                 15 
               
               
                   
                 Cotter Pin 
                 16 
               
               
                   
                 Spring Pin Retaining Pin 
                 17 
               
               
                   
                 Locking Helical Threaded Insert 
                 18 
               
               
                   
                 Penetrator 
                 20 
               
               
                   
                 Penetrator casing 
                 21 
               
               
                   
                 Suspension lug 
                 25 
               
               
                   
                 Legacy Charge well 
                 35 
               
               
                   
                 Legacy Internal plumbing 
                 40 
               
               
                   
                 FZU arming wires 
                 50 
               
               
                   
                 fuze well 
                 52 
               
               
                   
                 Arming cable 
                 55 
               
               
                   
                 Aft end (of penetrator) 
                 60 
               
               
                   
                 FZU adaptor cavity 
                 65 
               
               
                   
                 FZU adaptor holes 
                 70 
               
               
                   
                 FZU adaptor pin 
                 75 
               
               
                   
                 FZU adaptor cam hinge pin holes 
                 80 
               
               
                   
                 FZU adaptor flat face 
                 85 
               
               
                   
                 FZU adaptor angled base 
                 90 
               
               
                   
                 Stowed recess position depression 
                 95 
               
               
                   
                 Dividing ridge 
                 100 
               
               
                   
                 Open recess position depression 
                 105 
               
               
                   
                 Hardback 
                 110 
               
               
                   
                 Lanyard 
                 115 
               
               
                   
                 FZU 
                 120 
               
               
                   
                 Securing holes 
                 125 
               
               
                   
                 Chassis center arm 
                 130 
               
               
                   
                 Detent spring pin hole 
                 135 
               
               
                   
                 Safety hinge pin arm shelf 
                 140 
               
               
                   
                 Hinge pin arm 
                 145 
               
               
                   
                 Chassis forward end 
                 150 
               
               
                   
                 Cam arm forward end 
                 155 
               
               
                   
                 Openings 
                 160 
               
               
                   
                 Forward extension (cam arm) 
                 165 
               
               
                   
                 Downward extension (chassis) 
                 170 
               
               
                   
                 Chassis aft end 
                 175 
               
               
                   
                 Cam arm aft end 
                 180 
               
               
                   
                 Chassis recess 
                 185 
               
               
                   
                 FZU adaptor engaging face 
                 190 
               
               
                   
                 Leading edge (spring pin) 
                 195 
               
               
                   
                 Top surface (FZU adaptor) 
                 205 
               
               
                   
               
             
          
         
       
     
       FIG. 1  shows a legacy, traditional penetrator  20  cross section. It should be recognized that the term “penetrator” as used herein generally refers to any type of warhead, bomb, or missile that is armed upon deployment. For simplicity, the term penetrator is generally used throughout this specification, but covers these other configurations as well. 
     As shown in  FIG. 1 , legacy penetrators  20  will often have a charging well  35  and internal plumbing  40  for FZU arming wires  50  (not shown), which leads back to the fuze well  52 . This charging well  35  requires a large hole in the penetrator casing  21  which becomes a structural issue during a penetration event. Also shown are suspension lugs  25  that are often utilized to assist in handling the penetrator. 
       FIG. 2  shows one embodiment of an improved penetrator  20  design. As shown in  FIG. 2 , the improved penetrator does not have a hole in the penetrator casing  21  to accommodate the charging well  35 , nor does it require internal plumbing  40 . In this embodiment, the fuze well  52  can be accessed by the FZU arming wires (not shown) externally from the aft end  60  of the penetrator  20 . Using this improved penetrator configuration drives the need for external plumbing and components that can still arm the penetrator upon deployment. One benefit of this design is that that it removes the need for a connection between the internal plumbing  40  (which runs through the explosive material in the traditional, legacy design) and the fuze well  52 . The new design allows the explosive material to be contained and sealed in the penetrator  20 , without risk of a failure point between the plumbing  40  and fuze well  52 , or the plumbing  40  becoming loose or moving inside the penetrator  40  which can cause a premature reaction of the explosive material and failure of the munition. 
     In connection with the improved penetrator configuration shown in  FIG. 2 , Applicant has also developed the AGRA assembly  1 . One embodiment of the AGRA assembly is shown in  FIGS. 3-5 , and can be utilized in connection with the improved penetrator shown in  FIG. 2 . As shown generally in  FIGS. 3-5 , the AGRA assembly may contain an AGRA module  2 , a forward arming wire manifold  3 , arming wire conduit  4 , and aft arming wire manifold  5 . The AGRA module  2  will be described in more detail below. The forward arming wire manifold  3  provides a connection between the AGRA module  2  and the arming wire conduit  4 . The arming wire conduit  4  provides a protected area to receive the arming wire that extends from the AGRA module  2  (and ultimately attached to a FZU  120 ), through the forward arming manifold  3 , through the arming wire conduit  4 , through the aft arming wire manifold  5 , and into the fuze well  52 . The aft arming wire manifold  5  provides a connection between the arming wire conduit  4  and the penetrator casing  21  that allows the arming wire to extend into the fuze well  52 . The aft arming wire manifold  5  is preferably attached to the penetrator casing  21 . The arming wire conduit  4  may also be attached to the penetrator casing  21  (for example by brackets or other attachment mechanisms), but it is not required. 
     The forward arming wire manifold  3  is preferably made of cast or machined aluminum, plastic or steel, but can be made of other materials that can withstand the forces and stresses of the general environments inherent to internal/external weapon carriage during ground operations and flight. The arming wire conduit  4  is preferably made of seamless stainless steel tubing but can also be made of other materials that can withstand the general environments inherent to internal/external weapon carriage during ground operations and flight. The aft arming wire manifold  5  is preferably made of cast or machined stainless steel, but can be made of other materials that can withstand the general environments inherent to internal/external weapon carriage during ground operations and flight. 
     As shown in  FIGS. 3 and 4 , the AGRA module  2  may be positioned near the middle of the penetrator  20 . The AGRA module  2  may also be located in various other positions along the penetrator casing  21 , but the preferred location is generally toward the middle. This placement facilitates use of the new penetrator design with existing deployment systems and mechanisms for penetrators. As shown in  FIGS. 3 and 4 , the AGRA module  2  can be completely external to the penetrator casing  21 . In alternative embodiments, a recessed area, or depression, can be formed in penetrator casing  21  to allow the AGRA module  2  to have a lower profile as compared to having the AGRA module  2  sit on the outside of a standard penetrator casing  21 . In the preferred embodiments, the penetrator casing  21  does not have any holes (used to secure the AGRA module  2  to the penetrator casing  21 ) that penetrate to the internal portion where the explosive materials are located. 
     Referring to  FIG. 6A , one exploded view of one embodiment of the AGRA module  2  is shown. In this embodiment, the AGRA module  2  may include one or more of the following: an FZU adaptor  6 , chassis  7 , cam arm  8 , safety pin hinge  9 , cam hinge pin  10 , one or more spring pins  11 , one or more springs  12 , one or more spring cups  13 , detent spring pin  14 , washer  15 , cotter pin  16 , one or more spring pin retaining pins  17 , and one or more locking helical threaded inserts  18 . The FZU adaptor  6  can be made of any suitable material, but is preferably made of stainless steel. Similarly, the chassis  7  and cam arm  8  can be made of any suitable material, including stainless steel, but are preferably made of aluminum. Additional views of the AGRA module  2  (or components thereof) are shown in  FIGS. 6B-6D, 12-18 , and generally shown in its stowed, or closed, position.  FIG. 19  is an additional view of some of the components of the AGRA module  2 , namely the FZU adaptor  6 , cam arm  8 , spring pins  11 , springs  12 , spring pin retaining pin  17 , safety hinge pin  9 , and cam hinge pin  10 . 
     Referring to  FIGS. 6A, 6B, 10, 11, 15, and 16 , the FZU adaptor  6  may have a generally circular internal cross section, and contain a cavity  65 . The cavity  65  may be threaded to receive a FZU  120 . The bottom of the FZU adaptor  6  may also have FZU adaptor holes  70  to accommodate arming wire that can be attached to the FZU  120  when inserted into the cavity  65 . 
     Referring generally to  FIG. 6A , in one embodiment of the AGRA module  2 , the chassis  7  and cam arm  8  are connected, and with the help of the other components described, provide a partial housing for the FZU adaptor  6 . The FZU adaptor  6  may have FZU adaptor pins  75  on its exterior surface that can be seated in a channel formed between the interface of the chassis  7  and cam arm  8 . The cam arm  8  may have a series of ridges and depressions to allow for multiple orientations of the FZU adaptor  6  via the FZU adaptor pins  75  in different locations along the channel. For example, the cam arm  8  may have a stowed recess position depression  95  designed and configured to receive the FZU adaptor pins  75  when the FZU adaptor  6  is in a stowed position (in a generally horizontal orientation as shown in  FIGS. 12-18 ). As the FZU adaptor  6  moves from the stowed position to the open position (which can be in a vertical orientation, or some other position different from the stowed position), the FZU adaptor pins  75  can move from the stowed recess position depression  95 , over a dividing ridge  100 , and into an open recess position depression  105 . 
     The springs  12  and spring pin  11  provide an upward force that generally keeps the FZU adaptor  6  in a closed/stowed position when the FZU adaptor pins  75  are in the stowed recess position depression  95 . When sufficient force is applied to the FZU adaptor  6 , it pulls the FZU adaptor  6  into an open position (as shown in  FIGS. 8 and 11 ), causing the FZU adaptor  6  to rotate about the safety hinge pin  9  and moving the FZU adaptor pin  75  over the dividing ridge  100  and into the open recess position depression  105 . With the springs  12  and spring pin  11  continuing to provide an upward force, once in the open position, the FZU adaptor  6  remains in the open position. 
     In some embodiments, the safety hinge pin  9  acts to further connect and attach the FZU adaptor  6  to the chassis  7 . The safety hinge pin  9  can be received through openings in the side of the chassis  7  (or other location), FZU adaptor hinge pin holes  80 , and corresponding holes in the chassis center arm  130 . The safety hinge pin  9  may also have a hinge pin arm  145 . The chassis  7  may also have a spring biased detent spring pin  14 , located in a detent spring pin hole  135 , that protrudes from the chassis  7  such that when the safety hinge pin  9  is in place and the hinge pin arm  145  rotated into the safety hinge pin arm shelf  140 , the arm  145  depresses the detent spring pin  14 , at least partially into the body of the chassis  7 . The hinge pin arm  145  face that engages the detent spring pin  14  may also have a recess into which the detent spring pin  14  can be seated when the hinge pin arm  145  is rotated into the safety hinge pin arm shelf  140 . The detent spring pin  14  acts upon the safety hinge pin arm  145  so as to maintain its position unless manually unlocked for removal. 
     As described above, when in its stowed position, the FZU adaptor pins  75  are generally in the stowed recess position depression  95 . When force is applied and the FZU adaptor  6  moved toward an open position, the FZU adaptor  6  rotates about the axis of the safety hinge pin  9 , moving the FZU adaptor pin  75  toward the chassis forward end  150  and cam arm forward end  155 , over the dividing ridge  100 , and into the open recess position depression  105 . In the embodiments where the springs  12  and spring pins  11  are used, a relatively significant amount of force is required to move the FZU adaptor  6  from the stowed position to the open position. In other words, the springs  12  and spring pins  11  (described further below), and the connection between the chassis  7  and cam arm  8 , tend to keep the FZU adaptor  6  in place. The force required to move the FZU adaptor  6  to the open position most overcome the force applied by the springs  12  and move the FZU adaptor pin  75  from the stowed recess position depression  95 , over the dividing ridge  100 , and into the open recess position depression  105 . The weight of the penetrator  20  pulling on the lanyard  115  (still attached to the deployment system) is sufficient to move the FZU adaptor  6  to the open position. Once in the open recess position depression  105 , due to the continuing force applied by the springs, the FZU adaptor  6  remains in this orientation. When the FZU adaptor  6  is in its open position, the FZU adaptor engaging face  190  can rest against the chassis center arm  130  to stop the rotation of the FZU adaptor  6 . Additionally, in its open position, the FZU adaptor pin  75  may also engage the underside of the chassis  7  to help prevent further rotation. 
     When the FZU adaptor  6  is in its stowed position, and the FZU adaptor pins  75  located in the stowed recess position depression  95 , the FZU adaptor pins  75  may also rest against the underside of the chassis  7 . This point of contact keeps the FZU adaptor  6  from further rotation relative to the chassis  7 , and can help maintain the desired orientation (substantially horizontal in the figures). 
     The chassis  7  may have a recessed area on the underside to receive portions of the cam arm  8 , if the embodiment uses both the chassis  7  and cam arm  8  components. It should be recognized that various configurations could be used, including combining the chassis  7  and cam arm  8  into a single component, or changing the location and configuration of the “depressions” and “ridges” in which the FZU adaptor pins  75  may be seated. Preferably, the width of the cam arm  8  is smaller than the width of the peripheral edge of the chassis  7 . In a preferred embodiment, the openings (used to accommodate the springs  12  and spring pin  11 ) on the cam arm rest against the underside of the corresponding openings in the chassis  7  (also used to accommodate the springs  12  and spring pin  11 ), and the stowed recess position depression  95 , dividing ridge  100 , and open recess position depression  105  form the referenced channel on the underside of the chassis  7 . 
     In general use, the FZU adaptor  6  is normally in its stowed position when the penetrator is attached to its deployment system, for example, the undercarriage of an aircraft. To facilitate connection to its deployment system, in some embodiments, the penetrator may also include a hardback  110  that covers at least a portion of the penetrator  20 . The hardback  110  may cover the areas in which the AGRA module  2 , forward arming wire manifold  3 , portions (or all) of the arming wire conduit  4 , and the suspension lugs  25  are located. However, the hardback  110  preferably has openings above the location of the AGRA module  2  to allow connection between the AGRA module  2  and lanyard, to allow the AGRA module  2  to be deployed from its stowed position to an open position (see  FIGS. 7 and 10  as examples). The hardback  110  may also have openings to accommodate the suspension lugs  25 , which can extend through the hardback  110  openings. The hardback  110  can be made of any suitable material, but is preferably made of aluminum, and provides some protection against damage to the AGRA module  2  (and other components) when the penetrator  20  is being moved, stored, and/or loaded onto its deployment system. The hardback  110  may also facilitate and include components to allow attachment to the deployment system itself. The AGRA module  2  may be attached directly to the hardback  110  rather than to the penetrator itself. 
     The deployment system will often include a lanyard  115  connected to a FZU  120 . The FZU may be inserted into the FZU adaptor cavity  65 , and secured. In some embodiments, the FZU  120  is threaded, and screwed into the FZU adaptor  6 , using the threaded FZU cavity  65 . When the penetrator  20  is disengaged from the deployment system, the lanyard  115  remains connected to the deployment system, or the structure holding the deployment system (for example, the undercarriage of an aircraft). As such, when the lanyard  115  pulls tight, the force causes the FZU  120  and FZU adaptor  6  to rotate and move into an open position. As the FZU  120  and FZU adaptor  6  are pulled into the open position, the FZU  120  is triggered, through the arming wires, and arms the penetrator through the fuze well  52 , as is known and understood by those of skill in the art. Once armed, the penetrator will detonate as designed (e.g., on impact or other condition). 
     The FZU adaptor  6  may include any number of flat faces  85  on the exterior of the FZU adaptor  6 . As used herein, a “flat face” may refer to a portion of the exterior of the FZU adaptor  6  having a flat portion. Thus, if the FZU adaptor  6  has in internal circular cross section, some portions of the exterior surface of the FZU adaptor  6  may have the same circular shape, while others might be flat. In a preferred embodiment, the sides of the FZU adaptor  6 , and the top surface  205  preferably have flat faces  85 . These flat faces  85 , if used, may facilitate the flush configuration of the FZU adaptor  6  when its stowed position, and/or allowing the FZU adaptor to move through the large opening of the chassis  7  through which it rotates between the open and stowed positions. The FZU adaptor holes  70 , preferably in the bottom of the FZU adaptor  6 , allow for the arming wires or other electronic and signaling connections to be connected to the FZU  120  that may be seated in the FZU adaptor cavity  65 . In a preferred embodiment, the FZU adaptor  6  top surface  205  (when in its stowed position) has a flat face, and is substantially flush with the chassis center arm  130 . 
     The AGRA module  2  may also have securing holes  125  that allow the AGRA module  2  to be secured to the penetrator casing  21 , hardback  110 , or other structure. The securing holes  125  can be threaded or smooth. In one embodiment, the AGRA module  2  is secured to the penetrator casing  21 , but the holes in the penetrator casing do not pass all the way through the penetrator casing  21  to maintain superior structural integrity of the penetrator casing  21 . In other embodiments, the holes in the penetrator casing  21  can extend into the interior of the penetrator casing  21 . If the AGRA module  2  is attached to the hardback  110  (which in turn is connected to the penetrator  20 ), no holes are necessary in the penetrator casing  21  to receive the AGRA module  2  directly. The AGRA module  2  can be secured to the penetrator casing  21  or hardback  110  using any conventional methods or attachment mechanisms, including bolts or screws. In alternative embodiments, the AGRA module  2  can also be welded to the penetrator casing  21  or hardback  110 , or formed integral with the penetrator casing  21  or hardback  110 . 
     In some embodiments, the cam hinge pin  10  can be used to connect the chassis forward end  150  and the cam arm forward end  155 . It should be noted that chassis “forward end”  150  and cam arm “forward end”  155  are used in reference to the drawings as depicted. In use the referenced “forward end” is actually farther from the front of the penetrator. The chassis  7  and cam arm  8  can have openings  160  (the openings  160  in the chassis  7  are not shown in  FIG. 6(A)  because they are on the underside of the chassis  7 ) passing through the chassis forward end  150  and cam arm forward end  155  to allow the cam hinge pin  10  to pass through, and secure the components together.  FIG. 19  shows the cam hinge pin  10  passing through the openings  160  of the cam arm  8  (without the chassis  7 ). The cam arm forward end  155  may include forward extensions  165  that contain the openings  160  to receive the cam hinge pin  10 . Similarly, the chassis  7  may have downward extensions  170  (shown in  FIG. 15 ) that contain the openings  160  to receive the cam hinge pin  10 . As shown in  FIG. 15 , the forward extensions  165  of the cam arm  8  may be placed on the outside of the downward extensions of the chassis  7 , and the cam hinge pin  10  inserted, connecting the cam arm  8  and chassis  7  at their respective forward ends  155 ,  150 . The cam hinge pin  10  may be used in conjunction with a washer  15  and cotter pin  16  to secure the cam hinge pin  10  in place. As would be recognized by those of skill in the art, other means to secure the cam arm  8  and chassis  7  together can be used, including bolts or other common securing mechanisms. Alternative configurations of the chassis  7  and cam arm  8  are obviously possible, including use of a single component. Generally, the desired structure allows the FZU adaptor to have one or more positions that allow the FZU to be triggered at the desired time. 
     In some embodiments, the spring pin  11  may extend through openings in the cam arm  8  and chassis  7 , and with the springs  12 , spring cups  13 , and spring pin retaining pin  17 , hold the chassis aft end  175  and cam arm aft end  180  together. The chassis  7  may also have a recess  185 , used together with the opening of the chassis  7 , to allow the leading end  195  of the spring pins  11  to be seated below the top of the chassis  7  when in use. The leading end  195  of the spring pin may have an additional spring pin retaining pin  17  that passes through the spring pin  11  (forming a “T” shaped) so the spring pin  11  stays in place. Using this configuration allows the spring pin  11  to be pushed upwardly, exposing the leading end  195  of the spring pin retaining pin  17  as it moves up and out of the recess  185 . If the spring pin retaining pin  17  is removed, the spring pin  11  can be removed and the chassis  7  and cam arm  8  disconnected (at least at this connection point). In a preferred embodiment, the recess  185  may have a lip  210  to engage the spring pin retaining pin  17 . The recess  185  (and openings in the cam arm  8  and chassis  7 ) may also be configured such that the spring pin  11  and spring pin retaining pin  17  can be removed without removing the spring pin retaining pin  17  from the spring pin  11 . For example, the recess  185  (and openings in the cam arm  8  and chassis  7 ) can have a narrow channel that is long enough and wide enough such that when properly rotated, the spring pin retaining pin  17  can slip through the channel, but when rotated, the spring pin retaining pin  17  rests on the lip  210 . Other means to securing the spring pin  11  can obviously be used, and would be appreciated by those of skill in the art. Additionally, other means for securing the aft ends together can be used. 
     The AGRA module  2  enables the FZU  120  to be rotated 90 degrees or more in order to minimize the profile of the assembly outside the warhead casing, and upon weapon release allows the FZU  120  to be rotated to an optimal position 90 degrees (or other desired orientation) relative to its stowed position, positioning the FZU  120  in the correct orientation for activation and air flow. Activation and positioning of FZUs  120  are known and understood by those of skill in the art and not repeated here. Activation of the FZU  120  may be by any means known to those of skill in the art. By using the AGRA module  2 , the FZU  120  no longer needs to be mounted inside the penetrator (or warhead), nor do its arming wires need to travel through the interior of the penetrator/warhead.