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`V = sqrt(2E) * sqrt((M/C_x) + 1/2)`
Enter a value for all fields
The Initial Fragment Velocity for Cylindrical Charge calculator computes fragment initial velocity.
INSTRUCTIONS: Choose units and enter the following:
- (`sqrt(2E)`) Gurney Constant
- (m) Mass of Explosive
- (c) Speed of Sound
Initial Fragment Velocity for Cylindrical Charge (V): The velocity is return in meters per second. However, these can be automatically converted to compatible units via the pull-down menu.
The Math / Science
Initial Fragment Velocity can be used with other ballistic equations to predict either danger areas or fragment penetration.
Gurney constant (
) for some common explosives:
| Gurney Constant (√2E) | m/s |
|---|---|
| Compostion B | 2,774 |
| Composition C4 | 2,530 |
| HMX | 2.972 |
| Octol 75/25 | 2,896 |
| PETN | 2,926 |
| RDX | 2,926 |
| RDX / TNT 60/40 (Cyclotol) | 2,402 |
| Tetryl | 2,499 |
| TNT | 2,438 |
| Tritonal | 2,316 |
Resource:
- "Formulae for Ammunition Management." International Ammunition Technical Guideline. 1st ed. New York: UN, 2013. 2-3.UN SaferGuard. United Nations Office for Disarmament Affairs (UNODA), 20 May 2013. Web. 12 June 2015. <http://www.un.org/disarmament/convarms/Ammunition>.