Usage: Select the UOM system, that is English (lbs & fps) or Metric (kgs & meters), by default English is taken.
Type in the appropriate values & click the Calculate button. Change of the UOM system setting causes recalculation of the given data. UOM system change converts the entered data to the corresponding UOM system, so you can use it as a converter too.
The formulae used for calculations
are:
RI=(SM+WM+PC*CM)*MV/g*mcoef - for Recoil
Impulse;
RV=g*RI/GM - for Recoil
Velocity;
RE=GM*RV2/(2*g) - for Recoil
Energy;
SM is shot mass in grains or grams, SM >
0;*
WM is wad mass in grains or grams, WM > 0;*
MV is
the muzzle velocity in ft/sec or m/sec, MV > 0;*
GM is
the gun mass in lb or kg, GM > 0;*
CM is the charge
mass in grains grains or grams, CM > 0;*
g is the
gravitational constant, 32.17 or 9.81;
PC is the coefficient that
equals 1.5 (I assume the same value for the metric system, might be
wrong);
mcoef is 7000(number of grains in lb) for English system
& 1000(gramms in kg) for Metric system.
* - Only first two decimal digits are used.
Copyright by http://www.zvis.com/ 1999-2002. All rights reserved.
Requirements: Java 1.1 or higher, supported by Netscape Browser 4.5 or higher & MSIE 4.072 or higher.
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Stephen Ricciardelli