[roc-chat] Need advice for Fin Repair, Large Rocket
- From: Steve Jaben <smark.jaben@xxxxxxxxx>
- To: roc-chat@xxxxxxxxxxxxx
- Date: Mon, 11 Aug 2014 16:58:16 -0700
This is a loc V2, 7.5" diameter stretched out. I broke a fin at
the Saturday launch. You can see pictures on Rocketry forum:
http://www.rocketryforum.com/showthread.php?68463-Fin-Repair-Suggestions-Needed-for-Large-Rocket
The tailcone is made of polypropylene. The fin tabs go through the wall and
attached to the motor tube. There are two centering rings, one above and
below the fin tab that is glued to the fin tab and to the motor tube. Epoxy
doesn't really stick to poly propylene, so attaching extra centering rings
really holds the fin to the motor tube. I don't see any other way to fix
this, other than to cut a large window out of the polypropylene tailcone,
cutting out the old fin tab, and then gluing the whole thing back up with a
new fin. Getting the window of poly propylene to stick back in might also
be a challenge. The fins really don't attach to the tail cone because of
the polypropylene. Any other ideas or thoughts? And buying a whole new
tail section is not really what I had in mind :)
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