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Old 07-12-2005, 07:45 PM
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Join Date: Mar 2005
Location: Ft. Thomas, KY
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Quote:
Originally Posted by CPMcGraw
Looks like those over-zealous deployment charges found a weakness in your transition. It also looks like the parachute might have jammed in the tube, too. Had that happen on a Quest Gamma-Ray. Loud pop when the motor blew out...

You didn't use a liner tube? The damage doesn't really look irrepairable -- biggest challenge is removing the remains of the shoulders out of the tubes without damaging them any more.

The careful application of a Dremel with a fine grinding stone should do the trick...

I'd suggest using a piece of ST-5 the same length as the transition and shoulders as your pressure ducting when you rebuilt. If you look at the end of an 18mm motor, that's about all the inside area the casing allows anyway.

Make a core-cutting tool out of a piece of brass tubing the same size or a fraction larger than a piece of ST-5 (or BT-5), with the inside edge ground to a sharp taper. Use a drill of a matching diameter to the inside of the tubing to remove the excess from the center of the core, pushing the brass tubing along as you go. Sort of a make-shift round mortising tool. When you remove the brass tube, glue in a piece of ST-5, and you now have a stiffening backbone through that transition. The tubing will take the stress of ejection better.

Dennis is about to make your week a bit soggy, from what I'm seeing on TWC. Atlanta seems to be underwater, and it wasn't even in the direct path. Mobile came out with mostly downed power lines and maybe some broken tree limbs, but not much more.

Craig


I think you're right about finding the weak spot in the transition, but the parachute was rolled tightly enough that it would fall out. I also used minimal dog barph.

I'm sure I'll try some sort of rebuild, but I think I'll just opt for using the lower section as both power and recovery.

As for Dennis, we've only had light drizzle for the past two days. He might be around for the weekend though.
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