Clay & Carly Dunsworth <[email protected]> writes: > Does any one use the Q2G2 ignitors for ejection charges?
Yes. I use them on some projects, Adrian uses them quite often. They work great, and I like the long-wire-length ones you can get directly From the Quest web site. > 1. is it best to mount the altimeter the furthest aft I can, and bend > the antenna at the top. Bending the antenna is always a mixed bag. Try to avoid it if you can. > Would protruding the forward bulkhead and allowing the antenna the extra 2" > enhance the link.? Yes. We often drill a hole in plywood or glass bulkheads just big enough to run the wire through, then surround it with a bit of glue or clay to avoid having gasses get into the bay. A useful trick is to use a plastic drinking straw to keep the antenna wire straight while loading dog barf, chutes, etc beside it... then just pull the straw out leaving the wire fairly straight before closing the bay up. > My thoughts here, are that just bending the antenna, would be best, so that > it isn't damaged. I usually pack dog barf, a quick link, and a hefty 2 gram > FFFFG charge. *54mm* Keith has used some clear acrylic tubing to create a 'radome' to protect the antenna wire, but I haven't ever done that myself... though I had him give me some of the tubing so I can try it sometime. ;-) > 2. Mount the altimeter as far forward as possible. This would allow the > full length of the antenna to be above the bulkhead. > > I think this would provide the best wiring setup, but again has the draw > backs of having the antenna in an active area, not safely in the av > bay. My son Robert designed an airframe called RG-2 in 38mm with a bay that was just long enough for a TeleMetrum with battery and switch mounted below the board, and we did just what you're saying. By angling the hole through the bulkhead, we managed to have the wire run basically up the inside edge of the airframe tube in the payload bay. Using the drinking straw trick, it was easy to load the airframes up and we had good RF on all of them except the one my son sprayed with silver metallic Krylon... ;-) > Writing this, I think one of those clear poly antenna tubes from the RC toys > may be the ticket. I can even put a dap of epoxy on the end to seal it > off. ;-) Yep, that's essentially what Keith did with the acrylic tubing. Bdale
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