I am certain we are all familiar with the rubber shock cords Estes uses in their kits. I just replaced two of them, One in my Photon Disruptor and one in my Photon Probe. The rubber (or whatever material it is) had degraded near the knots connecting the shock cord to the nose cone and also at the knot attaching the cord to the Kevlar leader I had added to both rockets. The main line was still strong, but within an inch of both ends the cord would snap if a medium force tug was applied. I don't have any tension measuring devices or I would be more specific, but feel the tug was a lot less than most of the power kicks from the ejection charges. As I was replacing them, I wondered what I could use the old cords for since they were not suitable for use in rocketry and I have a large pile of them now since I don't use the supplied ones anymore.
Soooo....
Let's have a contest


Good Luck