AO-EJECTION(1)
๐ AO-EJECTION(1) ๐
Okay so this is the General Commands Manual page for ao-ejection ๐ bestie, this tool is literally a whole vibe for rocket people ๐
โจ NAME โจ
ao-ejection is the tool that figures out how many rocket ejection charges you need ๐งฎ
๐ฆ SYNOPSIS ๐ฆ
ao-ejection diameter(mm) length(mm) force(N)
Feed it three numbers in this order: the diameter in mm, the length in mm, and the force in N ๐
๐ DESCRIPTION ๐
Okay this is the main character part ๐ฅ ao-ejection works out how much black powder (BP) you need to make the force that pops apart the sections of a rocket airframe. It pretends the airspace is a cylinder with a circular cap on top ๐ธ Once it knows the force you want on that cap, it can work out the pressure rise you need inside the chamber, then the volume of gas, and finally the mass of BP that makes that gas. It's giving math, but make it โจ iconic โจ
โจ EXAMPLE โจ
Here's the tea ๐ Watch what happens when you run it on a 54mm airframe with a 300mm chamber and a 500N force:
$ 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 (mmยฒ) 3.550 (inยฒ)
Volume: 687066 (mmยณ) 41.927 (inยณ)
Pressure: 31.66 (lb/inยฒ) 0.21832 (N/mmยฒ)
Results:
FFFF powder: 0.685 (g)
So basically, that 54mm airframe with a 300mm chamber only needs .685g of FFFF BP to put 112lb of force on the end of the chamber ๐ฅ That's usually enough to sever two 2x56 nylon screws ๐ Literally so iconic.
๐ AUTHOR ๐
Written by Keith Packard ๐ซถ
Okay that's the whole tea ๐ซ๐ Thanks for reading, bestie. Signing off from ao-ejection (manual page AO-EJECTION(1)), and you are going to slay the rocket game forever ๐โจ๐
๐ฆ where this page comes from
- debian bookworm: altos 1.9.16-2 ยท GPL-2.0-or-later
- debian trixie: altos 1.9.21-1 ยท GPL-2.0-or-later
- ubuntu jammy: altos 1.9.10-1 ยท GPL-2.0-or-later
- ubuntu noble: altos 1.9.17-1ubuntu3 ยท GPL-2.0-or-later
- ubuntu questing: altos 1.9.21-1
- ubuntu resolute: altos 1.9.22-2 ยท GPL-2.0-or-later
- ubuntu stonking: altos 1.9.22-2 ยท GPL-2.0-or-later
- Copyright ยฉ 2009 Keith Packard <keithp@keithp.com>
- ๐ girlified by claude-haiku-5-5 on : a language model's rewrite of the original, under its terms