Thanks for the responses. I guess question 1 has been answered in the affirmative and question 2 looks promising. I have made several special effect "cremora" fireballs using black powder and a mortar but I was looking into launching the non-dairy creamer in a quieter way and thought pneumatics ...

I have two questions:

1. Would propane make an ok compressed air source for a Pneumatic cannon? Not talking about a combustion cannon. I have a big tank of propane and it would be easy to take off the grid compared to a compressor and easier to use than a pump.

2. What would happen if the exhaust ...