Demo Formulas

Question 1

Internal Timber Charge (Six problem solving format)

Answer 1

1) find Diameter
2) P=D^2 / 250
3) RE
4) PKG weight
5) Total # of target
6) total quantity

Question 2

Relieved Face Crater Formula (Six problem solving format)

Answer 2

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.

Question 3

Abatis Timber Charge formula (Six problem solving format)

Answer 3

1) find Diameter
2) P=D^2 /50
3) RE
4) PKG weight
5) Total # of target
6) total quantity

Question 4

Saddle Charge Dimensions

Answer 4

Thickness of charge: 1”
Base of Charge: 1/2 circumference of target
Long axis of charge: Circumference of target

Question 5

Conventional steel round stock (Six problem solving format)

Answer 5

1) find Diameter
2) P=D^2
3) RE
4) PKG weight
5) Total # of target
6) total quantity

Question 6

Conventional steel cutting charge formula (Six problem solving format)

Answer 6

1) Find total area
2) P = .375 x Area
3) RE
4) Pkg weight
5) Total # of target
6) total quantity

Question 7

Counterforce charge formula (Six problem solving format)

Answer 7

1) find information
2) P= 1.5 x Br (Diameter)
3) N/A
4) PKG weight
5) Total # of target
6) Total quantity

Question 8

which charge formula use package weights?

Answer 8

Counterforce, and Dirt Cratering charge

Question 9

Hasty Crater Formula (Six problem solving format)

Answer 9

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

Question 10

Deliberate Crater Formula (Six problem solving format)

Answer 10

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.

Question 11

C-shaped Ribbon charge formula (Six problem solving format)

Answer 11

1) find CV for all component
2) Total CV
3) N/A
4) Volume of explosive
5) Total # of target
6) total quantity

Question 12

Abatis Timber Charge considerations

Answer 12

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

Question 13

conventional breaching radius rules

Answer 13

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

Question 14

Expedient explosives charge formula

Answer 14

1) find information
2) Vcyl-VC=EV
3) N/A
4) Volume of explosive
5) Total # of target
6) Total quantity

Question 15

Ribbon charge formula (Six problem solving format)

Answer 15

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

Question 16

Internal Timber Charge Holes and depth

Answer 16

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

Question 17

Diamond charge formula (Six problem solving format)

Answer 17

1) Find information
2) CV=B^2
3) N/A
4) volume of explosive
5) total # of target
6) total quantity

Question 18

Saddle charge formula (Six problem solving format)

Answer 18

1) Find information
2) CV=B^2
3) N/A
4) volume of explosive
5) total # of target
6) total quantity

Question 19

Railroad tracks calculation

Answer 19

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

Question 20

External Timber Charge requirement

Answer 20

1”-2” thick, cover at least 1/2 circumference, 1lb kicker charge

Question 21

External/Ring Timber Charge (Six problem solving format)

Answer 21

1) find Diameter
2) P=D^2 /40
3) RE
4) PKG weight
5) Total # of target
6) total quantity

Question 22

Stump Removal measurement

Answer 22

measured at 12”-18” above ground level

diameter is rounded to next higher 1/2 foot

Question 23

which charge formula use RE factor and package weights?

Answer 23

Timber charge (Internal, External, and Abatis), Conventional Steel, conventional breaching

Question 24

conventional breaching formula (Six problem solving format)

Answer 24

1) find information
2) P= R^3 KC
3) RE
4) PKG weight
5) N= W/2R (Round off)
6) Total quantity

Question 25

which charge formula use volume?

Answer 25

advance steel, and expedient charge

Question 26

Stump removal charge formula (Six problem solving format)

Answer 26

1) Find diameter (convert to feet)
2) 1’ per explosive
3) N/a
4) PKG weight
5) Total # of target
6) Total quantity

Question 27

Ring Timber Charge thickness

Answer 27

1/2 inch thick up to 15” diameter
1 inch thick up to 30” diameter
explosive band should be as wide as possible