P1: Nitrous at Balls in '09
PVC Fuel Grains
Last Update, 5/30/08 by Stephen Daniel
This page documents the PVC fuel grains we use.
For now we are using 3" schedule-40 PVC pipe as our fuel grain. These grains are easy and cheap to fab, but we are shifting to PBAN for future tests.
The fuel grain is a 9.5 " long piece of schedule-40 PVC pipe. Nominal ID is 3.042", nominal OD is 3.500". We wrap the pipe in brown craft paper until it fits snugly in the motor casing. The paper both ensures a good fit and also insulates the motor casing.
Advantages of this design:
We started with a 2' long piece of schedule-40 pipe. We wrapped it in paper, using craft spray-adhesive to stick it down.
Next we cut to length and then sand the ends.