Test 6

Identical to Test 5, except using our new PVC pipe cap casting tube caps. We hope that since these leave explicit air gap above the propellant, that we'll get "cleaner" grains with the mix self-leveling in the casting tubes.

These grains were cast on 4 July 2015.

Results

• Grain 1, ?g net
• Grain 2, ?g net
• Grain 3, ?g net
• Grain 4, ?g net

Observations

Pour again went really smoothly.