Calc Place Flashcards
Method of tamping
External charges are tamped. Internal charges are stemmed
Components of explosive train
Primary. Secondary. Main charge
Time blasting fuse two types
Safety fuse. M700 time fuse
How long should you wait for non electric misfire
60 minutes
Pre mature firing of electrical caps caused by
Radio transmissions, operating generators, lightning, power lines, static electricity
Keep 155 meters from energized power lines
Blasting caps
Mdi shock tube
89.5% hmx 10.5% AL powder
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
Ring charges
Diameter 15” or less-1/2in
1in thick up to 30” D
Detectable destructive effects
Deformation. Spalling. Radial cracking
Transportation of explosives require
Reflective placards both ends and sides. 2 fire extinguishers b/c. Speeds less than 35
Storage of explosives require how much airspace on the top and bottom of explosives
3” bottom 18” top
Rules for explosives stored in the open
Weigh no more than 500 pounds per pile
Placed more than 140 ft apart
SADD acronym
Safe Accessibility Dryness Drainage
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
M32
M34
CD-450
10 caps
50 caps
70 caps
M51
Blasting cap test set
Ammonium nitrate
.42 re
Requires booster
Burning rate m700
30-45sec per foot
M6
Electric blasting cap. .5 amps 3 volts
M151
Low fiber set cord 5-7.5 grains petn per foot
M152
RAMS (remote activation munition system) comes with m6 m16 m26
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
3
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
