This is the command ao-ejection that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
ao-ejection - Compute rocket ejection charges
SYNOPSIS
ao-ejection diameter(mm) length(mm) force(N)
DESCRIPTION
ao-ejection computes the amount of black powder necessary to generate the desired force to
separate sections of a rocket airframe. It assumes a cylindrical airspace covered by a
circular cap. With that and the force to be exerted on the cap, ao-ejection can compute
the necessary pressure rise within the chamber, the volume of gas necessary and finally
the mass of BP to generate the gas.
EXAMPLE
$ ao-ejection 54 300 500
Input parameters:
Diameter: 54.0 (mm) 2.126 (in)
Length: 300.0 (mm) 11.811 (in)
Force: 500.0 (N) 112.404 (lb)
Chamber values:
Area: 2290 (mm²) 3.550 (in²)
Volume: 687066 (mm³) 41.927 (in³)
Pressure: 31.66 (lb/in²) 0.21832 (N/mm²)
Results:
FFFF powder: 0.685 (g)
This demonstrates that a 54mm airframe with a 300mm chamber requires .685g of FFFF BP to
generate 112lb of force on the end of the chamber. This is usually sufficient to sever two
2x56 nylon screws.
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