Thanks ... for a diagram i haven't gotten that far yet, but here's the guts. I only have silver solder, i don't use lead. i relay like the stuff i have.
This is all mounted in the nosecone. 1 TM, 1 companionboard, 1 or 2 - ARTS 2. 3 skin sensors embedded in the cone and supporting foam. 1 pressure transducer ran to a voltage divider on its own power supply..(later date, still not solid on how that is going to work.) 1 10mw 217 mhz transmitter, in the payload bay. The belkin wire was not shielded, but just 4 twisted pair. I think i have some that is shielded. the TM and arts 2 are will both be initiating apogee and main deployment. The attached drawing shows the sled (green) utilizing 38mm coupler and 2.56 couplers. everything will be mounted here, the tm and ts will be top and bottom a the same location in the 38mm tube the 2.56 section will have 2 couplers and also mount all the power supply.The arts 2 will be here. the internal tubes, will be epoxied in with spacers, then foam will be poured in, this will reinforce and make the nose cone survive higher force levels. switches and terminals will be mounted to the aft bulkhead, and breather ports will be approx 1/2" off the base of the shoulder. this will not be a separating nose cone, it will fasten to the section of body tube that will separate from the motor case at a single point. 3 small screws will be inserted at the shoulder to secure the body/nosecone/sled to each other. I would like to use 2 of these points as a screw switchs to arm the redundant altimeters. archetype rocketry line cutters will hold the main partialy reefed as a drogue until main altitude, it will cut the tie, and allow the main to unfurl. Its a very progressive burning ex motor. https://picasaweb.google.com/CCDunsworth/ScreechingWeasel# Learning a lot where i did not expect it, definately a nice feeling to be Fish-out-of-water on this little rocket. Clay I have yet to determine anchor for recovery "*typical*, i am thinking i can epoxy webbing to the outside for the 2.56 bt, then the foam and such will make an excellent non-metallic anchor. On Wed, Mar 27, 2013 at 11:28 AM, w9ya <[email protected]> wrote: > Um....I use the following; > > 1 - Properly routed and supported *stranded* wiring. i.e. NO > unsupported flexing of the wiring loom. > > 2 - Tinned (with solder of course) wiring is specifically indicated. > It will not release from under the screw terminal when the terminal is > properly tightened and supported. > > 3 - Double check the connections before each flight; by making sure > the wiring and screw are snug AND that the wiring is still routed and > supporteed correctly. > > YMMV of course but I preclude intermittent continuity issues resulting > from the lack of a gas tight ferrule connection. > > Very best regards; > > - Bob Finch > > > > On Wed, Mar 27, 2013 at 8:16 AM, Thomas Müller > <[email protected]> wrote: > > If you like to attached stranded wire to screw terminals you should > crimp > > the ends in a ferrule. Tin soldering is not a good idea since the thin is > > pretty soft and flowable which might lose the connection. > > > > > > > > Thomas > > > > > > > > Von: [email protected] > > [mailto:[email protected]] Im Auftrag von Clay & Carly > > Dunsworth > > Gesendet: Mittwoch, 27. März 2013 14:59 > > An: Altus Metrum > > Betreff: Re: [altusmetrum] wires > > > > > > > > I have always steered away from the solid core. Most of the time where > > space isnt critical ive used machine tool wire, but doesnt work with the > > "smallness" of the Altus Metrum products.(16ga). I bought some smaller > 26ga > > stranded, becuase another altimeter i have, the MFG suggest 26ga > stranded as > > the "smallest" wire that would be safe. this was after I discovered blue > > color on the copper of the ematch leads. (now i suspect chemical > reaction of > > the bare copper, oily fingers, and BP residue.) Oddly its almost too big > for > > the TM i have. > > > > > > > > I have never tinned the ends of my wires, but the belkin cable i cut up > the > > other day suprised me that the wires were stranded copper, and seemed > > suitable for this. I always envisioned they were like old telephone cable > > with that fiberstuff, that would be unsuitable. Maybe with this small > of a > > gage i should solder tin the ends for added reliablity? > > I have litterally hundreds of feet of the stuff, and would be a "freebe" > for > > the rest of my av-building life. > > > > > > > > Clay > > > > I guess thats why we test! > > > > On Tue, Mar 26, 2013 at 10:41 PM, Michael Stephens < > [email protected]> > > wrote: > > > > My only worry would be that solid core wire doesn't like vibration very > much > > but stranded wire doesn't do well in screw terminals. I would think it > could > > definitely handle the voltage, especially since its such low duty cycle. > > > > On Mar 26, 2013 8:16 PM, "Clay & Carly Dunsworth" <[email protected] > > > > wrote: > > > > Anyone use cat5e cable for thier avionics bay? > > > > Making a small launcher for the kids, i noticed the 4 twisted pair i > > have would be a good match for my bay? > > > > Its good for things like telephones and data signal, but what about > > ematch voltage? > > thinking the sheething and twisted pair may be good at RF shielding? > > Clay > > > > _______________________________________________ > > altusmetrum mailing list > > [email protected] > > http://lists.gag.com/mailman/listinfo/altusmetrum > > > > > > _______________________________________________ > > altusmetrum mailing list > > [email protected] > > http://lists.gag.com/mailman/listinfo/altusmetrum > > > > > > > > > > _______________________________________________ > > altusmetrum mailing list > > [email protected] > > http://lists.gag.com/mailman/listinfo/altusmetrum > > > _______________________________________________ > altusmetrum mailing list > [email protected] > http://lists.gag.com/mailman/listinfo/altusmetrum >
nose cone Model (1).pdf
Description: Adobe PDF document
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