The main
internal tube for the sustainer section is a 7.5" tube. This tube is
65" long and is in the process of being covered in two layers of 10.oz
glass.
These pictures
also satisfy the Tripoli Level 3 requirement, that there must be at least
one picture of you working on your rocket. Well here I am.
Here's the finished tube.
It's been slotted to accept the main fins and the motor mount has been slide
in just for the picture.