- Feb 1, 2009
- Reaction score
Tonight I was getting a few rockets ready for this weekends CMASS launch. I have 2 new rockets that I built with kevlar thread for the shock cord. The kevlar thread caused a nasty zipper in my Stormcaster a while back. So I am trying a new anti-zipper technique. I bought some foam decorations at Wally Mart for 67 cents each. The foam is slightly denser than Nerf foam. I cut a piece and cut a slit sideways and slid it over the cord. I positioned it so that it always makes contact on the body tube edge. I hope it is enough to prevent a zipper!! I will see how it withstands the exhaust gases.