TM 31-210
Improvised Munitions Handbook
| Section II |
No. 9 |
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FUNNEL SHAPED CHARGE |
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| An effective shaped charge can be made using various types of commercial funnels. See table for penetration capabilities. | |
| MATERIALS REQUIRED: | |
| Container (soda or beer can , etc.), approximately 2-1/2 in. diameter x 5 in. long (6-1/4 cm x 12-1/2 cm) | |
| Funnel(s) (glass, steel, or aluminum) 2-1/2 in. (6-1/2 cm) in diameter | |
| Wooden rod or stick, 1/4 in. (6 mm) in diameter | |
| Tape | |
| Blasting cap (electrical or non-electrical) | |
| Sharp cutting edge | |
| Explosive | |
| PROCEDURE: | |||||||||||||||||||||||||||||||||||||||||||||||||||||
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1. Remove the top and bottom from can and discard. |
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2. Cut off and throw away the spout of the funnel(s). |
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NOTE: When using 3 funnels (see table), place the modified funnels together at the outer ridges. |
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| 3. Place the funnel(s) in the modified can. Tape on outer ridges to hold funnel(s) to can. |
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| 4. If plastic explosive is used, fill the can with the explosive using small quantities, and tamp with wooden rod or stick. |
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| NOTE: If castable explosive is used, refer to step 4 of Section II, No. 3. | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| 5. Cut wooden rod to length 3 inches longer than the standoff length. (See table.) Position three of these rods around the explosive filled can and hold in place with tape. | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| NOTE: The position of the rods on the container must conform to standoff dimensions to obtain the penetrations given in the table. | |||||||||||||||||||||||||||||||||||||||||||||||||||||
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| 6. Make a hole for blasting cap in the center of the explosive with rod or stick. |
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| CAUTION: Do not place blasting cap in place until the Funnel Shaped Charge is ready for use. |
| HOW TO USE: | |
| 1. Place blasting cap in the hole in top of the charge. If non-electrical cap is used, be sure cap is crimped around fuse and fuse is long enough to provide safe delay. |
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| 2. Place (tape if necessary) the Funnel Shaped Charge on the target so that nothing is between the base of charge and target. | |
| 3. If electric cap is used, connect blasting cap wires to firing circuit. | |
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