Initial Commit - Copy from Altus Metrum AltOS

ao-utils/ao-ejection.1

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+.\"
+.\" 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