back into the hole, the secondlme of charges dl splices It entirely. The resulting teardrop shaped crater la very steep sided on the blunt end (the end having the three delay charges).

IV. Improvised I>ev1ceg.

a. Bangalore torpedes, if aTaiiable.cau be extremely effective If employed In an antipersonnel role. Beat results are obtained If the Bangalore js planted upright In the ground so that the fragmentation effect will radiate out in 360 degree*.

b. The fragmentation hand grenade Is a versatile weapon tha; lends itself to a wide variety of Dooby trapping actions. One of the simplest booby traps Is the grenade-ln-a-can. The shipping container or can Is affixed to a tree or o'.her permanent object. The grenade, with poll ring removed Is placed in the can so that the arming lerer Is held down by the can. A string or wire 1* then so placed that the victim will pull the grenade from the can, releasing the lever and detonating the grenade.

c. Improvising electrical booby trap firing devices. Each of the following almple booby traps can be used In conjunction with a wide variety of casualty producing charges, from the 3.5 inch rocket, fired by expedient electrical meinj, to the bangalore torpedo primed to be detonated in an antipersonnel role.

d. Open loop. The open loop arrangement shown Is the ONLY break in an otherwise complete electrical circuit. A wide variety of actions oc the part ol the victim could result In pulling the two bare ends of the wire together.

10 WTTErt

10 WTTErt


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Figure 10 Open Loop

Figure 11 Clothespin e. Expedient firing of 3.S-Ines Rocket. T>.a follovtng technique Is ona method for firing th« rocket alactricaly. Eltharth« cardboard «hipping container or a V-shaped wooden troti^b tnay be used as an expedient laimchar, with tha trough beiaf preferred if »Tillable.

(1) The rocket la prepared for electrical ftrlaf by looaUng Um two wire In the no axle and fin assembly that are coated with clear plastic. (The other green, red, and blue wirea are disregarded). After aortpUg Ue toda of the clear plastic wirea, ho provide a food ooataot for splloinf lato the firing wire, the connection ts mafe and preferably taped. Experience has Indicated (hat the railing apltee is the preferable spltoe to be «sad without any adverse effect on rocket accuracy.

r ijure 9 Crtiering Techmqua m-11

The line of two charges above should be primed to be detonated simultaneously. The line of three charges should all be primed to detonate simultaneously after the correct delay. The line of three charges should be detonated from ope to two seconds aiter the first two charges detonate. The delay can be achieved in a variety of ways, but two separate electrical firing systems are probably the easiest. An expedient mettod of quickly sinking the bore holes themselves is to set up five 15 pound shaped charges (M2A3) over the desired locaticns. They should be provided with an Improvised 30 Inch standoff and all be detonated to-g»th»~. Th* effect Af th* delay in the crattrlng operation la to bagln to man a large amcurt of earth around the first two charges, and then before It can fall

(2) The bare-riding safety bead la restored and the rocket la placed oa the trough so that ths bore -ridlaf safety will face a side cf the trough during firing. The shorting clip Is removed, the rocket Is aimed, an electrical power source ts provided and the rocket Is Ore*.

(3) Obviously results ooiaparabie to those obtained by using ths should met be sapscted. As wtth all expedient demolition work, trial and error experimentation Is etreesed. A* experienced demoliUonlst can reliably hit a M gallon drum, a relatively snail target, op to a range of 40 to Si yardn. to aa aatltmk role, satisfactory results ooold he expected apto 150 yards. The rocket firing can be oontroUed by ths operator, or can be effected by a wide variety of electrical booby trapping techniques. TKle aapadleaU ttae of tka rocket ui lends it»elf equally well to employment la an a/itlpereoonel role.

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Figure 11 Clothespin

Any j>uii ©n th« itrlnj wtU r«*cvt th» w<dj« «ni cmpitc, ih» « ire . »;

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Any j>uii ©n th« itrlnj wtU r«*cvt th» w<dj« «ni cmpitc, ih» « ire . »;

(4) Power source* cea be a 10-cap blasting machine er any of the fol* lowing dry eell batteries: BA-317/U, BA-270/U. BA-iff Aï or combination« of tha BA-30 /U.

(8) Safety precautions ehoold include all of thoee aesociated with electrica! Düng as outlined In FM 5-25, ExploelveeandDemolitions. Although It would be en extremely rare occurrence, we should operate on the assumption that the rocket may blow up en the launching sits and take appropriai« precautions to prevent injury from such as see idea*.

Safety SHOKKB?


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