Calc Place Flashcards by Lesco Bronden

Method of tamping

External charges are tamped. Internal charges are stemmed

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Components of explosive train

Primary. Secondary. Main charge

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Time blasting fuse two types

Safety fuse. M700 time fuse

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How long should you wait for non electric misfire

60 minutes

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Pre mature firing of electrical caps caused by

Radio transmissions, operating generators, lightning, power lines, static electricity

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Keep 155 meters from energized power lines

Blasting caps

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Mdi shock tube

89.5% hmx 10.5% AL powder

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External charges use flat charge with a thickness to width ratio 1:3

5lb less-1 inch thick
5-40lb- 2 in thick
40-300lb- 4in thick
300lb+ - 8in thick

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Ring charges

Diameter 15” or less-1/2in

1in thick up to 30” D

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Detectable destructive effects

Deformation. Spalling. Radial cracking

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Transportation of explosives require

Reflective placards both ends and sides. 2 fire extinguishers b/c. Speeds less than 35

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Storage of explosives require how much airspace on the top and bottom of explosives

3” bottom 18” top

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Rules for explosives stored in the open

Weigh no more than 500 pounds per pile

Placed more than 140 ft apart

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SADD acronym

Safe Accessibility Dryness Drainage

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When destroying explosives in a pile

Piles no more than 2000 lbs. 2 lbs per 100lbs of packed explosives. 1 lb per 100 lbs of unpacked explosives

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M32
M34
CD-450

10 caps
50 caps
70 caps

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M51

Blasting cap test set

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Ammonium nitrate

.42 re

Requires booster

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Burning rate m700

30-45sec per foot

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Electric blasting cap. .5 amps 3 volts

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M151

Low fiber set cord 5-7.5 grains petn per foot

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M152

RAMS (remote activation munition system) comes with m6 m16 m26

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Range of the m152

Low power 2-5km

High power 5-8 km

3 detectable destructive effects

Deformation, radial cracking and spalling

Negative pressure from a blast lasts___ times longer than positive pressure

Tamping should be at least _____ to the breaching radius

Equal

External timber formula

P=D2/40 Rectangular charge 1-2 in thick

Abatis formula Diameter of trees needed for enemy vehicles

P=D2/50 Wheeled 18" Track 24" Charge placed 5' above ground

Internal charge formula (timber)

P=D2/250

M11

30 ft shock tube. Cap is nonelectric

Ring charge (timber) how thick for trees diameter 15" less and 15-30"

1/2 thick | 1" thick

4 types of steel

Structural, Nickel Molybdenum, high carbon alloy, and cast iron

Conventional steel cutting formula

P= A .375 P= D P=D2

Railroad tracks

Tracks less than 5" 1/2 pound tnt More than 5" 1 lb tnt Switches/crossovers 1lb Frogs 2 lbs

Advanced steel ribbon charge

Non circular steel up to 3" thick Charge is 1/2 thickness of target

Advanced steel formula

P= volume of target/ volume of explosives VC=B2 Saddle for mild steel (cross fracture)Diamond(stress wave)for high carbon up to 8"

Breaching charges should be placed so that there is _______ surface on the other side to facilitate spalling

Free reflective

Breaching charge formula

P=R3KC External charge round radius up to nearest 1/2foot Internal charge round up to nearest 1/4foot N=W/2R Less than 1.25 use 1 1.25-2.5 use2 2.5 and higher round off

Opposed(counter force) charge

P= thickness x 1.5 P is pound of plastics Works on concrete columns, pillars less than 4' thick

Expedient breaching of hard surface (side walk)

1lb of explosives per 2" of pavement Tamp twice the breaching radius

Cratering charge formula

Hasty L-16/5+1 50lb Deliberate 7-80 5-40 Relief face L-10/7+1=Fr En=Fr-1 Fr-40 En-30

Hasty, deliberate and relief faced craters are what shape

V shaped Trapezoidal

Relieved face craters have friendly and enemy row that are primed _____ to allow for a ________ delay between rows

Separately 1/2- 1 1/2 seconds

Stumping

Dead stumps=1lb per foot Live stumps=2lb per foot Increase 50% for standing timber

Boulder removal charge methods

Snake hole, Block hole and Muddcapping

Monroe effect Miznay-Chardin effect

Produces linear tubular fractures Produces powerful blunt nose projectile

Expedient charges angle of cavity? And what is optimum?

30-60 degrees 42 is optimum

Expedient platter charge

Plate weighs 2-6 lbs | Weight of explosives= weight of plate. Max eff range is 25 meters

Expedient grape shot

1lb of explosives = 4lb of shrapnel

Dust initiator charge

Charge is 1lb 1 part explosive 1 part incendiary

Fougasse | Use ____ of m4 thickener per______ of fuel

3 ounces | 1 gallon

``` How much c4 is used for mortars 60mm 81mm 4.2 inch 120mm ```

1/4 block 1/3 block 1/2 block 1 block

Daisy chained claymore a should be placed how far apart

3-5 meters minimum

M303

SOF demo kit

Penetration of a small efp vs medium efp

1" of armor 2.5" of armor

3 types of breaching

Mechanical, ballistic, explosive

Where are water impulse charges placed on metal doors and wood

Center for metal and locks for wood