Flashcards in Expedient Explosives (Chapter 13) Deck (78)
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30. How much M112 is placed on a 81 mm?
1/3 block
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34. What is amount of comp B in a 60 mm?
1lb
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29. How much M112 is placed on a 60 mm?
¼ block
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For Crimper method time fuse, Top of tightening nut to top of jaw is how many seconds?
4 Sec
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11. What is most crucial component of an expedient platter charge?
Buffer material for plate integrity (thick card board, or rubber)
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7. What is the formula for expedient shape charge?
Volume of Cylinder – Volume of Cone = Explosive Volume
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17. How much cover do you need for a dust initiator charge?
3 lb per 1000 cubic feet for enclosed
5 lb per 1000 cubic feet for partially enclosed
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4. What is one disadvantage of using expedient shaped charges?
Consistent results are difficult to obtain due to variables such as explosive density, configuration, and cavity liner density
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8. What is the formula for volume of cylinder?
3.14 x R^2 x Height of explosive
(2 x height of the cone)
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43. Can you remove the fuse from a white phosphorus grenade?
No.
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42. What is the minimum distance for emplace daisy chained claymores?
3-5 meters apart
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5. What container can be used to construct an expedient shaped charge?
Almost any container will work (Cans, Jars, bottles, drinking glasses, champagne, wine and whisky bottles)
Some containers have a built in cavity
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3. What is an expedient shaped charge?
Designed to produce a tubular or linear fracture/hole in a target
Use an explosively formed plasma jet to penetrate the target
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1. What is Munroe effect?
An explosive arranged in a concave pattern has a greater effect on a target.
Shock waves created from difference directions were found to increase in speed as they were reflected off eachother.
Greater concavity/depth = more effective
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10. What is difference between the Munroe effect and Miznay cardin effect?
Munroe effect: shock waves reflect to each other which increasing speed of explosive, and forms a Jet
Miznay effect: large sheet of explosive with a sturdy metal backing plate. Main force the explosion is directed away from the backing plate. After initiation, the explosion turns the metal plate into a blunt nosed projectile
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18. In a dust initiator charge, how much cover will 1lb of explosive effectively detonate?
Up to 40 lbs
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31. How much M112 is placed on a 4.2 IN?
½ block
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24. What is the ratio for M-4 fuel thickening compound per gallon of fuel? How much would you use for a 55 gallon fuel drum?
Use 3 ounces M-4 thickening compound per gallon
150 ounces M-4 and 50 gallons
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36. What is the amount of comp B in a 4.2 IN?
9lbs
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2. What types of explosive used in expedient shaped charge?
Plastic explosive
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35. What is the amount of comp B in a 81 mm?
2lbs
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14. What are the characteristics of dust initiator charge?
Most effective in closed spaces
Consists of an explosive, an incendiary mix, and a suitable, finely divided organic material (cover/dust) or a volatile fuel called a surround
Charge size is 1lb (half explosive / half incendiary mix)
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9. What is the formula for volume of cone?
3.14 x R^2 x 1/3 height of cone
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32. How much M112 is placed on a 105 mm?
½ block
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23. What types of fuel (oil) can be used for expedient flame fougasse?
Non ethanol gas
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16. What is the charge size of the dust initiator charge?
Charge size is 1lb (half explosive / half incendiary mix)
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40. What are the two ways to prime mortar rounds?
Prime from fuse-well
Remove carrying ring, or fuse, and pack fuse well with C4. 360 degree fragmentation and C4 conservation.
Prime externally
Up to 240mm, detonate with 2lbs explosives in good contact with case, just forward of rotating band
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33. How much M112 is placed on a 120 mm?
1 block
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6. What are the optimum characteristics of an expedient shape charge?
a) Cavity liner: Copper, zinc, glass, and tin
If unavailable, cut a cone shaped cavity into the explosive
b) Cavity angle: 42-45 degree (will work 30-60 degree)
c) Explosive height: two times the cone height
d) Standoff height: 1 ½ the diameter of cone
e) Detonation point: exact top center of the charge
Ensure cap is covered with explosive
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