Making a smoke machine forcefully blast out the smoke.

[ChrisH]

Originally Posted by sanddrag

The right way to do this I believe would be with liquid nitrogen, but the special hoses, fittings, and valves that won't freeze up I hear are quite expensive. The smoke machine doesn't look like it is going toi work out. It seems like if it is confined at all, it just turns back into an oil and makes a big mess. So, no smoke this time I guess.

At work we deal with LN2 all the time. While choosing appropriate materials is required, I don't think they are all that expensive. Of course I work in Aerospace and not on a student budget. Our financial pain threshold is a little different. Flexible tubing of the sort you need runs between $5 and $10/ inch. But much of the run could be stiff pipe which would be much cheaper.

I will go look around our LN2 tanks and see what I can find out about manufacturers. Also it might be possible to rent a big dewar for storage. I know one of our suppliers used to do that for their N2 supply.

Don't give up yet! I hadn't thought about LN2 when you brought up the problem, but I think the pressure relief on our systems has about the effect you want.

ChrisH