21. The base of the BAT cartridge case was frangible , the reaction gases venting directly backwards through a single large venturi. 22. A first publication on this subject is given in " Frangible design of instrument landing system / glide slope towers ". 23. Frangible nuts were also used for separation of the two aft structural attachments of the external tank prior to orbital insertion.24. Some effort was also put into a " frangible booster " for the Ajax, whose casing would destroy itself in flight. 25. The minimum recommended overall length of an EMAS installation is, of which at least is to consist of the frangible material. 26. This was in contrast to the US recoilless designs, which used a frangible sidewall to the cartridge case and multiple venturi. 27. It is a long tube filled with a mixture of combustible gases with a frangible diaphragm at either end to contain the gases. 28. In operations in Iraq, the shotgun was the preferred method of door breaching by infantry units, ideally with a frangible breaching slug. 29. Immediately before SRB ignition, frangible nuts attached to the top of these studs were detonated, releasing the Shuttle assembly from the platform. 30. A structure is frangible if it breaks, distorts, or yields on impact so as to present a minimum hazard to the vehicle.
