heat-shrink tube over Kevlar

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heat-shrink tube over Kevlar

Postby ogivemeahome » Fri Nov 29, 2013 9:01 pm

Hey all. Not sure how this will go but it's worth a try.
I put some heat-shrink tube over the Kevlar anchor cord (see pic). The idea being that Kevlar is flame resistant but not flame-proof. The heat-shrink tube will tolerate the flame from a cigarette lighter for a few seconds so maybe it will tolerate the ejection charge without too much wear and tear. Since the Kevlar is encapsulated it should be better protected? If nothing else, the heat-shrink prevents the epoxy from making a hard point.
Comments/suggestions welcome.
24mm MMT ready to fit to the BT.
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Re: heat-shrink tube over Kevlar

Postby GDJ » Mon Jan 06, 2014 9:05 am

We've been doing this in Canada for a little while. The heat shrink is a pretty good insulator. I've used regular cotton twine as a shock cord on some of my LPR's and with the heat shrink they last at least 10 launches. If you use Kevlar plus the heat shrink tube it will most likely outlast the rocket by a fair margin.

Nice design BTW! 8)
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