Paladin
Contributor
I think you could do it using PVC and then step the PVC for the CO2 cartridge up to the the diameter of a balloon tire bicycle tube. Fold and then cement with Aqua Seal the end of the tube. I would cut the tube so that the effective length deflated would be about 12 inches and experiment from there. The needle would puncture the CO2 cartridge if perhaps contained in the center of a threaded cap, screw the cap down, pow.
N
Not bad. I'll add it to the prototype list and see if I can work it out. It would be bigger and take up more storage room, but it could have its uses.