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Hi Yogi,
Didn't know the numbers, but, I guessed at what you're saying.
The internal cardstock PSI Tube is fine, the 3/4" PVC on the other side of the valve came apart (not glued together).
I launched with the PVC tank psi gauge showing 70# PSI. Used a shorter PVC pipe (33") inside the paper because of binding and wind issues. Ideal plan is to use a PVC launch pipe the same length as the internal paper tube (67").
Used a 1/2" wide glued tab and paid particular attention to the gluing, when the PSI tube was made. Then ran a strip of regular scotch tape down the whole length of the glue seam. A bigger paper chamber will be much easier to make.
You can see from the video that there was also a wind issue, along with freezing rain and fog.
After reading your numbers above, might do some surgery and install a larger PSI Chamber to fit a little looser around the 3/4" PVC, using masking tape to "shim" the Paper to PVC at the bottom. Right now it is 1.11" I.D..
To split/pop the Tag 125# PSI chamber is going to take more than 70# of air pressure the system supplied.
Landing in the wet snow caused a little discoloration to the ink, but, no structural damage.
Will carefully remove the present PSI tube and then test until it "pops" this week. Gluing it to a 3/4" PVC coupler attached to the system.
Max air pressure won't go over 100# PSI, due to limits of PVC tank launch system valve. Max operating PSI on the valve is 150#, thus giving me a 50# safety factor. Rocket should never see these pressures if it can move freely.
Rocket has challenged me to get it to 100' AGL....
quote- "My hat's off to you for actually launching that masterwork (probably why I keep my stomp rockets simple - you don't want to see me cry after they land ...)"
I know what you mean-you wouldn't have anything to give to your lucky class members...
Mike
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