[AR] Re: Liquid biprop abort sequence
- From: Henry Spencer <hspencer@xxxxxxxxxxxxx>
- To: Arocket List <arocket@xxxxxxxxxxxxx>
- Date: Thu, 8 Feb 2018 23:39:55 -0500 (EST)
On Thu, 8 Feb 2018, Wyatt Rehder wrote:
I'd suppose it would depend on how graceful you want the abort
sequence. I've always been a fan of the safe on power-off, with all
your valves being spring return on loss of power. That way you could
just have a relay open and kill power to the vehicle which slams
everything into a safe position. Especially useful if your computer
gets into a bad state and wont sequence things properly anyway...
Or if your power genuinely goes out for some reason! (E.g., vibration
shook a bracket loose and it fell across exposed terminals and shorted
your power supply.)
Springs aren't the only form of backup energy source for a clean power-out
shutdown, but they are the simplest.
Henry
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