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authorKeith Packard <keithp@keithp.com>2014-05-15 23:10:54 -0600
committerKeith Packard <keithp@keithp.com>2014-05-15 23:11:17 -0600
commit0bf1c74e83fe49a11916b52596363f4dd56c522c (patch)
treea2b6f8f4ae77ee1d9df0b576596b575abcf75ca5 /doc
parentdbb0fcf6d161a9d49fe699c37a18e4c33c409b59 (diff)
doc: Document the Apogee Lockout setting
Signed-off-by: Keith Packard <keithp@keithp.com>
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@@ -2184,6 +2184,20 @@ NAR #88757, TRA #12200
</para>
</section>
<section>
+ <title>Apogee Lockout</title>
+ <para>
+ Apogee lockout is the number of seconds after boost where
+ the flight computer will not fire the apogee charge, even if
+ the rocket appears to be at apogee. This is often called
+ 'Mach Delay', as it is intended to prevent a flight computer
+ from unintentionally firing apogee charges due to the pressure
+ spike that occurrs across a mach transition. Altus Metrum
+ flight computers include a Kalman filter which is not fooled
+ by this sharp pressure increase, and so this setting should
+ be left at the default value of zero to disable it.
+ </para>
+ </section>
+ <section>
<title>Main Deployment Altitude</title>
<para>
By default, the altimeter will fire the main deployment charge at an