Double check with your L3CC. I've read in several places that NAR dropped that requirement. Personally I think it just adds complexity and more room for human error.
On Fri, Apr 15, 2016 at 9:52 AM, Rob Derstadt <[email protected]> wrote: > 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 > >
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