[roc-chat] Re: BP for Deployment of Main Question
- From: Richard Dierking <redierking@xxxxxxxxxxx>
- To: <roc-chat@xxxxxxxxxxxxx>
- Date: Thu, 8 Dec 2011 18:53:27 +0000
One possible failure mode: If it's in parallel, if one of the matches is bad
and doesn't have continuity, you will not know, because the altimeter will
detect continuity in the second and indicate that everything looks OK. So one
canister would go, but probably not be enough BP for a successful deployment.
We tested two matches in series yesterday, and they both went fine. I've been
using series for airstarts and haven't had a problem (up to 4 engines). I
thought people were crazy when I first heard about using series, but when a
match lights the "plasma ball" becomes very conductive for a moment. However,
I have not used series for deployment charges, so thought it would be a good
idea to hear from people that had experience with this. Richard > From:
xsive.guy@xxxxxxxxx
> Date: Thu, 8 Dec 2011 10:39:46 -0800
> Subject: [roc-chat] Re: BP for Deployment of Main Question
> To: roc-chat@xxxxxxxxxxxxx
>
> Definitely in parallel. Otherwise, when the first one burns out the
> rest would stop getting current. By wiring them in parallel even
> after the first one goes the rest continue to get current.
>
> I'd like to know the answers to your other questions though.
>
> Thanks,
> Mike
>
> On Thu, Dec 8, 2011 at 10:09 AM, Richard Dierking
> <redierking@xxxxxxxxxxx> wrote:
> > Say your main deployment section is 7.5" diameter, 24" long and using three
> > (3) 2-56 nylon shear pins. How much BP?
> >
> > Also, what's the advantage of using two or more deployment canisters instead
> > of just one? For multiple canisters, would you wire in series or parallel?
> > (One 9 volt battery and Perfectflite WD altimeter with main deployment at
> > 1100'.)
> >
> > Richard Dierking
> > BTW: Kurt, we're not intending to turn the nose into a second stage :-)
> >
> >
>
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