Well, the cardboard I am using is something like a thin brown bristol board - it is about .053" thick. The fins are made from two layers each of the cardboard and 110# cardstock (which is about .005" thick). So each fin is about .116" thick.
The centering rings (there are 6) are one of the keys of the design - they are what keeps the outer skin round. They are made from one layer of cardboard and one layer of cardstock - thickness about .058".
The rocket has a .96" diameter stuffer tube running nearly the length of the rocket, and the fins go through the outer skin and are also glued to the stuffer tube - so the rocket is, in reality, like a 1" diameter rocket with a 4" skin wrapped around it - the outer skin does little for the rocket's longitudinal strength.
The nose cone is one cone, two transitions and one cylinder. There is a 1/2" foam core disk in the base of the shoulder.
I plan to put two 12" parachutes in the rocket for recovery. There is a 3-1/2" chute compartment above the stuffer tube. I didn't have any kevlar cord, so I used four strands of cotton thread for the shock cord. I cut a hole in the top centering ring and looped the string around the stuffer tube - that sucker ain't going anywhere!
All in all, I figure there are about 18 or 19 pages of printed cardstock that went into it. The forward and aft body tube sections take two pages each.
Now all I have to do is figure out what to launch it with
Attached is a pdf file outlining the dimensions and positions of the parts.
Greg
