Open Rocket kevlar shock cord?

[billdz]

Hi,
In OR under shock cords, the only choices are for elastic, nylon, thread, and custom. Should we choose custom for kevlar? How to determine the Material Density?
Thanks,
Bill

 

[Bat-mite]

I think you would need to get that from a Kevlar manufacturer. Density = mass / volume, and the volume would be hard to measure. Plus, tubular Kevlar is very porous, and that complicates things.

Bottom line -- the easiest way to use OR is to get all your measurements correct; then, when the rocket is built, override your mass and CG with measured values.