Crimped body tube repair

I need some advice. I have a Comanche - 3 with a crimped body tube. Should
I remove the entire crimped section or cut tube in half at the crimp? I was
planning on using a spent D motor casing as the coupler. Any advice is
welcome.
Thanks,
M Miller
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Reply to
M Miller
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Randy
Reply to
Randy
If it's a small crimp, slide an Estes coupler inside of the tube to act as a reinforcement. If it's a major crimp, cut it back to "clean" tubing and replace it with a coupler only, or if the crimp is larger, a section of new tubing. I'd stay away from using a spent D as a coupler. It's overkill and waaaaaayy to heavy. On a 3-stage rocket, weight reduction is important. If you don't have any couplers, use a piece of the crimped tubing. After slitting and straightening it out, cut a small piece off of it lengthwise and reroll it to a slightly smaller size. It doesn't have to be pretty since it'll be hiden inside of the rocket.
Mark Simpson NAR 71503 Level II God Bless our peacekeepers
Reply to
Mark Simpson
snipped-for-privacy@home.com (Mark Simpson) wrote in news: snipped-for-privacy@posting.google.com:
You can also use CA to "re-stiffen" the tube at the site of the crimp. Let it soak in and dry, then sand it smooth.
len.
Reply to
Leonard Fehskens
I wouldn't use a spent D for this; it would constrict the tube and could lead to the wadding or chute getting stuck at that point.
Where is the crimp located? If it's near the top of the tube, just cut off the tube flush. If it's farther back and you don't want to spoil the looks by doing this, cut the crimped section out, plus about 2" extra. Use this extra piece to fashion a joiner by slicing it down the side and removing about 1/8". Glue the two halves back together (use epoxy preferably, as wood glue won't stick well to the paint on the outside of your joiner.
If you have any scrap BT-50 lying around you won't need to take out the extra bit to make a joiner, obviously.
Reply to
BB
After crimping too many "Mongeese", I fixed the last one with a wrap of masking tape and some thin CA.
It still lives.
Reply to
Kurt Kesler
(some snippage)
Switching geese for chickens, Kurt?
~Duane Phillips.
Reply to
Duane Phillips
That is what that Mongoose gets for hunting me chickens. A crimpin'.
Reply to
Kurt Kesler
That's how I fix zippers on my Estes rockets.
Mark Simpson NAR 71503 Level II God Bless our peacekeepers
Reply to
Mark Simpson

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