I agree with the horizontal "safe mode" technique. It's what I use now.
The current NAR requirement states: "The capability must exist to externally disarm all pyrotechnic devices on-board the rocket. In this context, ‘disarm’ means the ability to physically break the connection between a pyrotechnic system and its power source. ***Simply turning off the device controlling the pyrotechnic(s) may not be sufficient.***" 1. So is this really just using the other pole on the rotary switch to control the battery connection? On Fri, Apr 15, 2016 at 10:37 AM, <[email protected]> wrote: > Send altusmetrum mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.gag.com/mailman/listinfo/altusmetrum > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of altusmetrum digest..." > > > Today's Topics: > > 1. Advice on wiring dual Telemetrums for arm/safe? (Rob Derstadt) > 2. Re: Advice on wiring dual Telemetrums for arm/safe? (w9ya) > 3. Re: Advice on wiring dual Telemetrums for arm/safe? (w9ya) > 4. Re: Advice on wiring dual Telemetrums for arm/safe? > (Chris Attebery) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 15 Apr 2016 09:57:17 -0600 > From: Rob Derstadt <[email protected]> > To: [email protected] > Subject: [altusmetrum] Advice on wiring dual Telemetrums for arm/safe? > Message-ID: > < > cacycnxq1csrdaukeyi2objzegyegspfa4md7fint4peziob...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Hello, > > I'm trying to work out how to wire up the outputs of two Telemetrums (one > primary, one backup) so that I can add an extra arm/disarm rotary switch > between the outputs and the terminal blocks (the NAR L3 requirement to cut > power completely from the pyro's). > > This is my initial wiring diagram: > > > https://github.com/robderstadt/NAR-L3-Project/blob/master/images/plans/GizmoXL_Wiring.png > > Normally I'd just *try* it and see what happens, but I don't want to fry > two board if I get it wrong. I'm also concerned that in the "safe" position > that the continuity indicator on each board would still indicate everything > green, which could lead to a launch with the pyro's inhibited. > > Has anyone flown this configuration before? If so, any suggestions on how > to hook it up? > > Thanks guys. > > -Rob > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.gag.com/pipermail/altusmetrum/attachments/20160415/d697d7c1/attachment-0001.html > > > > ------------------------------ > > Message: 2 > Date: Fri, 15 Apr 2016 10:23:24 -0600 > From: w9ya <[email protected]> > To: Altus Metrum <[email protected]> > Subject: Re: [altusmetrum] Advice on wiring dual Telemetrums for > arm/safe? > Message-ID: > <CAASHNdXAcBka= > [email protected]> > Content-Type: text/plain; charset="utf-8" > > Um, please check with your L3CC.....quite a few of them do NOT want you to > fly with switches in series with your charges !! > > Best regards; > > Bob F. > > On Fri, Apr 15, 2016 at 9:57 AM, Rob Derstadt <[email protected]> wrote: > > > Hello, > > > > I'm trying to work out how to wire up the outputs of two Telemetrums (one > > primary, one backup) so that I can add an extra arm/disarm rotary switch > > between the outputs and the terminal blocks (the NAR L3 requirement to > cut > > power completely from the pyro's). > > > > This is my initial wiring diagram: > > > > > > > https://github.com/robderstadt/NAR-L3-Project/blob/master/images/plans/GizmoXL_Wiring.png > > > > Normally I'd just *try* it and see what happens, but I don't want to fry > > two board if I get it wrong. I'm also concerned that in the "safe" > position > > that the continuity indicator on each board would still indicate > everything > > green, which could lead to a launch with the pyro's inhibited. > > > > Has anyone flown this configuration before? If so, any suggestions on how > > to hook it up? > > > > Thanks guys. > > > > -Rob > > > > _______________________________________________ > > altusmetrum mailing list > > [email protected] > > http://lists.gag.com/mailman/listinfo/altusmetrum > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.gag.com/pipermail/altusmetrum/attachments/20160415/bd203845/attachment-0001.html > > > > ------------------------------ > > Message: 3 > Date: Fri, 15 Apr 2016 10:33:25 -0600 > From: w9ya <[email protected]> > To: Altus Metrum <[email protected]> > Subject: Re: [altusmetrum] Advice on wiring dual Telemetrums for > arm/safe? > Message-ID: > < > caashndx4uphxhxgn+rjh1mkk81qomser7p6dioyf3fwwubs...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > P.S.... with the "flight mode" safeguards (turning on the unit while > oriented horizontally protects you from incidental firing of charges, and > then rebooting the TM after thee rocket has been placed on the pad and made > ready for flight) makes the pyro activation switches essentially redundant > !! (Virtually 100%, um; more or less....) > > > On Fri, Apr 15, 2016 at 10:23 AM, w9ya <[email protected]> wrote: > > > Um, please check with your L3CC.....quite a few of them do NOT want you > to > > fly with switches in series with your charges !! > > > > Best regards; > > > > Bob F. > > > > On Fri, Apr 15, 2016 at 9:57 AM, Rob Derstadt <[email protected]> > wrote: > > > >> Hello, > >> > >> I'm trying to work out how to wire up the outputs of two Telemetrums > (one > >> primary, one backup) so that I can add an extra arm/disarm rotary switch > >> between the outputs and the terminal blocks (the NAR L3 requirement to > cut > >> power completely from the pyro's). > >> > >> This is my initial wiring diagram: > >> > >> > >> > https://github.com/robderstadt/NAR-L3-Project/blob/master/images/plans/GizmoXL_Wiring.png > >> > >> Normally I'd just *try* it and see what happens, but I don't want to fry > >> two board if I get it wrong. I'm also concerned that in the "safe" > position > >> that the continuity indicator on each board would still indicate > everything > >> green, which could lead to a launch with the pyro's inhibited. > >> > >> Has anyone flown this configuration before? If so, any suggestions on > how > >> to hook it up? > >> > >> Thanks guys. > >> > >> -Rob > >> > >> _______________________________________________ > >> altusmetrum mailing list > >> [email protected] > >> http://lists.gag.com/mailman/listinfo/altusmetrum > >> > >> > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.gag.com/pipermail/altusmetrum/attachments/20160415/aa002ec6/attachment-0001.html > > > > ------------------------------ > > Message: 4 > Date: Fri, 15 Apr 2016 09:37:09 -0700 > From: Chris Attebery <[email protected]> > To: [email protected], Altus Metrum <[email protected]> > Subject: Re: [altusmetrum] Advice on wiring dual Telemetrums for > arm/safe? > Message-ID: > < > cap5djdsnvxmzghc_d_nqyxxtkc45q43yapwutx_zkm+jq--...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > I'm pretty sure that NAR dropped that requirement. If your L3CC is > insisting I'd find another. > > I'm keeping my L3 wiring EXTREMELY simple. Both altimeters will be direct > wired to the charges and use a screw switch to the enable pins. No safe > switches, shunts, or terminal strips to intruduce points of failure. > > On Fri, Apr 15, 2016 at 9:23 AM, w9ya <[email protected]> wrote: > > > Um, please check with your L3CC.....quite a few of them do NOT want you > to > > fly with switches in series with your charges !! > > > > Best regards; > > > > Bob F. > > > > On Fri, Apr 15, 2016 at 9:57 AM, Rob Derstadt <[email protected]> > wrote: > > > >> Hello, > >> > >> I'm trying to work out how to wire up the outputs of two Telemetrums > (one > >> primary, one backup) so that I can add an extra arm/disarm rotary switch > >> between the outputs and the terminal blocks (the NAR L3 requirement to > cut > >> power completely from the pyro's). > >> > >> This is my initial wiring diagram: > >> > >> > >> > https://github.com/robderstadt/NAR-L3-Project/blob/master/images/plans/GizmoXL_Wiring.png > >> > >> Normally I'd just *try* it and see what happens, but I don't want to fry > >> two board if I get it wrong. I'm also concerned that in the "safe" > position > >> that the continuity indicator on each board would still indicate > everything > >> green, which could lead to a launch with the pyro's inhibited. > >> > >> Has anyone flown this configuration before? If so, any suggestions on > how > >> to hook it up? > >> > >> Thanks guys. > >> > >> -Rob > >> > >> _______________________________________________ > >> altusmetrum mailing list > >> [email protected] > >> http://lists.gag.com/mailman/listinfo/altusmetrum > >> > >> > > > > _______________________________________________ > > altusmetrum mailing list > > [email protected] > > http://lists.gag.com/mailman/listinfo/altusmetrum > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.gag.com/pipermail/altusmetrum/attachments/20160415/8cfab391/attachment.html > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > altusmetrum mailing list > [email protected] > http://lists.gag.com/mailman/listinfo/altusmetrum > > > ------------------------------ > > End of altusmetrum Digest, Vol 64, Issue 1 > ****************************************** >
_______________________________________________ altusmetrum mailing list [email protected] http://lists.gag.com/mailman/listinfo/altusmetrum
