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Determination of critical diameter. This test establishes the minimum physical size a charge of a specific explosive must be to sustain its own detonation wave. The procedure involves the detonation of a series of charges of different diameters until difficulty in detonation wave propagation is observed. Massive-diameter detonation velocity.
The XTX8003 extrudable explosive, used in the W68 and W76 nuclear warheads, is a mixture of 80% PETN and 20% of Sylgard 182, a silicone rubber. [26] It is often phlegmatized by addition of 5–40% of wax , or by polymers (producing polymer-bonded explosives ); in this form it is used in some cannon shells up to 30 mm caliber , though it is ...
The critical mass for lower-grade uranium depends strongly on the grade: with 45% 235 U, the bare-sphere critical mass is around 185 kilograms (408 lb); with 19.75% 235 U it is over 780 kilograms (1,720 lb); and with 15% 235 U, it is well over 1,350 kilograms (2,980 lb). In all of these cases, the use of a neutron reflector like beryllium can ...
Main fill for the Spider Grenade, thus a low critical diameter is required. [ 14 ] The performance of PAX -28, a thermobaric , containing a mixture of RDX , DNAN, Al , AP and MNA was found to have an indoor explosive equivalency factor of 1.62 when compared to Composition B . [ 12 ]
Another useful design feature is sub-calibration, the use of a liner having a smaller diameter (caliber) than the explosive charge. In an ordinary charge, the explosive near the base of the cone is so thin that it is unable to accelerate the adjacent liner to sufficient velocity to form an effective jet.
C-4 or Composition C-4 is a common variety of the plastic explosive family known as Composition C, which uses RDX as its explosive agent. C-4 is composed of explosives, plastic binder, plasticizer to make it malleable, and usually a marker or odorizing taggant chemical.
Though known since 1990, [3] TEX is still an experimental explosive. However, given its large critical diameter and low shock sensitivity, it is an ideal candidate for insensitive large-calibre ammunition such as general-purpose bombs, artillery shells, torpedoes and depth charges. [2]
The barrel had an inside diameter of 6.5 inches (16.5 cm). Its length was 70.8 inches (1.8 m), which allowed the bullet to accelerate to its final speed of about 1,000 feet per second (300 m/s) [5] before coming into contact with the target. When the bullet is at a distance of 9.8 inches (25 cm), the combination becomes critical.