Calculate the Area of a Circle
Area = pi x r 2 Pi (already entered by default)
Enter the Radius
The Area =
Caclulate the Volume of a Cylinder
** Note: This uses the area from the above calculation **
Volume = pi x r2 x L Enter the Length -->
The Volume =

Calculate the Real Volume of the Pressure Chamber
Chamber Volume - Nested Barrel Volume = Factored VolumeEnter Chamber Volume Enter Nested Barrel Volume
Factored Volume of Chamber =

Calculate the Chamber to Barrel Ratio
Ratio = Chamber Volume / Barrel Volume Enter the Chamber Volume
Enter the Barrel Volume
The Ratio =

Calculate the Muzzle Pressure of the Gun
Set Values:
  • Chamber Presure : Pc
  • Barrel Pressure : Pb (@ the muzzle)
  • Average Pressure : Pa
  • Chamber Volume : Vc
  • Barrel Volume : Vb
  • Chamber Pressure : 100 psi
Pb = (Pc x Vc) /(Vb + Vc)
Enter the Chamber Volume Enter the Barrel Volume
Enter the Chamber Pressure
Muzzle Pressure =

Calculate the Average Pressure of the Gun
Average Pressure = (Chamber Pressure + Muzzle Pressure)/2 Enter the Chamber Pressure
Enter the Muzzle Pressure
The Average Pressure =

Calculate the Average Force on the Projectile
Average Force = Average Pressure * Area of End of ProjectileEnter the Average Pressure = Enter the Area of Projectile
Average Pressure =

Highly Modified from
Free JavaScripts provided
by The JavaScript Source

This page, the JavaScript, page, and its' source code, the PyroCookbook, and the PyroCookbook logo are all Copyright Rusty Tracey 2002