MrCrowley wrote:Were they using CO2? Looking at the video it is hard to tell if the cannon just slipped out of its sockets or if the socket exploded.
Your mouse musket was dropped right on the fitting it seems, the cannon last 5 years which is pretty impressive anyway. I myself wouldn't use a cannon after that long.
If DWV ABS has similar fittings as DWV PVC, then the failure seen in that video may not have been avoided by the use of ABS since short socket depths in the fittings could still cause a failure.
I honestly don't remember if they used CO2. The failure was from the design. The cannon has 3 arms, an over under design with the chamber in the center, a T, 2 sprinkler valves, and then two barrels on elbows. Due to the design the recoil of the launch broke the smaller elbow or pipe at the rear of the barrel, due to the support at the muzzle end and the loose barrel, this tweaked the entire launcher so all the small plumbing shattered causing the chamber to rocket off into the stands. The launcher contained no DWV and passed the safety inspection.
I don't remember the event that caused the Mouse Musket crack, but I belive it was standing on end and fell over. The crack was discovered much later after the new piston was built. It was never dropped from a high distance. It only fell it's own length.
If you look at my ABS test cannon, I have had good luck with ABS even when the DWV sockets are not fully seated, unlike PVC. That fitting has to deal with the torque of barrel whip and has survived fine.