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| author | Bdale Garbee <bdale@gag.com> | 2009-08-18 18:56:09 -0600 |
|---|---|---|
| committer | Bdale Garbee <bdale@gag.com> | 2009-08-18 18:56:09 -0600 |
| commit | d996aa9b32fb0eb385bd3d158256c29788a42fe3 (patch) | |
| tree | 85d483975f735729d04f270b4e6ce8f59a978613 | |
| parent | b3b2d3c475a135084b5628c730fc6fca1ba0817b (diff) | |
| parent | 7d4ceb75a454e6c9b3fe0bd934fadcb5104dea36 (diff) | |
Merge branch 'master' of ssh://git.gag.com/scm/git/fw/altos
| -rw-r--r-- | ao-utils/Makefile.am | 2 | ||||
| -rw-r--r-- | ao-utils/ao-ejection.1 | 55 |
2 files changed, 57 insertions, 0 deletions
diff --git a/ao-utils/Makefile.am b/ao-utils/Makefile.am index 705ff4d5..9f60ef0f 100644 --- a/ao-utils/Makefile.am +++ b/ao-utils/Makefile.am @@ -1 +1,3 @@ dist_bin_SCRIPTS = ao-ejection + +man_MANS = ao-ejection.1 diff --git a/ao-utils/ao-ejection.1 b/ao-utils/ao-ejection.1 new file mode 100644 index 00000000..259b13ee --- /dev/null +++ b/ao-utils/ao-ejection.1 @@ -0,0 +1,55 @@ +.\" +.\" Copyright © 2009 Keith Packard <keithp@keithp.com> +.\" +.\" This program is free software; you can redistribute it and/or modify +.\" it under the terms of the GNU General Public License as published by +.\" the Free Software Foundation; either version 2 of the License, or +.\" (at your option) any later version. +.\" +.\" This program is distributed in the hope that it will be useful, but +.\" WITHOUT ANY WARRANTY; without even the implied warranty of +.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +.\" General Public License for more details. +.\" +.\" You should have received a copy of the GNU General Public License along +.\" with this program; if not, write to the Free Software Foundation, Inc., +.\" 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. +.\" +.\" +.TH AO-EJECTION 1 "ao-ejection" "" +.SH NAME +ao-ejection \- Compute rocket ejection charges +.SH SYNOPSIS +.B "ao-ejection" +\fIdiameter(mm)\fP +\fIlength(mm)\fP +\fIforce(N)\fP +.SH DESCRIPTION +.I 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, +.I 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. +.SH EXAMPLE +.nf + $ 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) +.fi +.P +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. +.SH AUTHOR +Keith Packard |