Demo Formula Flashcards
Internal Timber Charge (Six problem solving format)
1) find Diameter
2) P=D^2 / 250
3) RE
4) PKG weight
5) Total # of target
6) total quantity
Relieved Face Crater Formula (Six problem solving format)
1) width of hasty crater
2) Friendly: 40 lbs. Enemy: 30 lbs.
3) N/A
4) 40, 30 divided by Package weight
5) N= (L-10) / 7 +1
6) Friendly/Enemy totals per hole x # of holes = Total quantity of packages.
Abatis Timber Charge formula (Six problem solving format)
1) find Diameter
2) P=D^2 /50
3) RE
4) PKG weight
5) Total # of target
6) total quantity
Saddle Charge Dimensions
Thickness of charge: 1”
Base of Charge: 1/2 circumference of target
Long axis of charge: Circumference of target
Conventional steel round stock (Six problem solving format)
1) find Diameter
2) P=D^2
3) RE
4) PKG weight
5) Total # of target
6) total quantity
Conventional steel cutting charge formula (Six problem solving format)
1) Find total area
2) P = .375 x Area
3) RE
4) Pkg weight
5) Total # of target
6) total quantity
Counterforce charge formula (Six problem solving format)
1) find information
2) P= 1.5 x Br (Diameter)
3) N/A
4) PKG weight
5) Total # of target
6) Total quantity
which charge formula use package weights?
Counterforce, and Dirt Cratering charge
Hasty Crater Formula (Six problem solving format)
1) width of hasty crater
2) 50 lbs of explosive per hole
3) N/A
4) 50 divide by package weight
5) N = (L-16) / 5 +1 then round up
6) 50 x Number of holes = Total quantity of package
Deliberate Crater Formula (Six problem solving format)
1) width of hasty crater
2) 5’ hole 40lbs, 7’ hole 80lbs
3) N/A
4) 40, 80 lbs divide by package weight
5) N = (L-16) / 5 +1 then round up
6) 7 ft./5 ft. totals explosive per hole x # of holes = Total quantity of packages.
C-shaped Ribbon charge formula (Six problem solving format)
1) find CV for all component
2) Total CV
3) N/A
4) Volume of explosive
5) Total # of target
6) total quantity
Abatis Timber Charge considerations
Charges placed at 5’ above ground
diameter of tree should be 18” for wheel vehicle
diameter of tree should be 24” for track vehicle
3 to 5 meter apart 45 degree toward ENY
conventional breaching radius rules
External = thickness of target, rounds up to near 1/2 foot Internal = 1/2 the thickness of target, rounds up to near 1/4 foot
Expedient explosives charge formula
1) find information
2) Vcyl-VC=EV
3) N/A
4) Volume of explosive
5) Total # of target
6) Total quantity
Ribbon charge formula (Six problem solving format)
1) thickness and wide (for wide always convert feet to inch)
2) CV= CT x CW x CL
* CT= 1/2 of thickness or 1/2”
* CW= 3 x CT
3) N/A
4) Volume of explosive
5) Total # of target
6) total quantity
Internal Timber Charge Holes and depth
Trees up to 18” diameter = 1 hole
Larger than 18” diameter = 2 hole
2 types of hole: Dimensional and Circular
2” Diameter and 2/3 deep in timber
Diamond charge formula (Six problem solving format)
1) Find information
2) CV=B^2
3) N/A
4) volume of explosive
5) total # of target
6) total quantity
Saddle charge formula (Six problem solving format)
1) Find information
2) CV=B^2
3) N/A
4) volume of explosive
5) total # of target
6) total quantity
Railroad tracks calculation
Rails 5” or higher use 1lb of TNT
Rails Less than 5” use ½ lb of TNT
Crossover and switches 1lb of TNT
Frogs 2lbs of TNT
External Timber Charge requirement
1”-2” thick, cover at least 1/2 circumference, 1lb kicker charge
External/Ring Timber Charge (Six problem solving format)
1) find Diameter
2) P=D^2 /40
3) RE
4) PKG weight
5) Total # of target
6) total quantity
Stump Removal measurement
measured at 12”-18” above ground level
diameter is rounded to next higher 1/2 foot
which charge formula use RE factor and package weights?
Timber charge (Internal, External, and Abatis), Conventional Steel, conventional breaching
conventional breaching formula (Six problem solving format)
1) find information
2) P= R^3 KC
3) RE
4) PKG weight
5) N= W/2R (Round off)
6) Total quantity
which charge formula use volume?
advance steel, and expedient charge
Stump removal charge formula (Six problem solving format)
1) Find diameter (convert to feet)
2) 1’ per explosive
3) N/a
4) PKG weight
5) Total # of target
6) Total quantity
Ring Timber Charge thickness
1/2 inch thick up to 15” diameter
1 inch thick up to 30” diameter
explosive band should be as wide as possible
