Quantcast

Open Rocket kevlar shock cord?

The Rocketry Forum

Help Support The Rocketry Forum:

billdz

Well-Known Member
Joined
Feb 11, 2017
Messages
1,222
Reaction score
76
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

Rocketeer in MD
Joined
Dec 5, 2013
Messages
10,986
Reaction score
1,738
Location
Maryland
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.
 
Top