Thanks clide. I am new to all of this and that animation gives me a better idea of what I am dealing with

Thanks for the reply POLAND_SPUD. I like the idea of using a relay to open and close the valve. What are you using to power it? Also what is a QEV? I'm looking at about 3-5 minute intervals for each shot. About enough time to have one group leave an area and another to come by.

Thanks for the input so far guys. I should be more clear on the venue though. This event is being held in a cornfield maze so you can understand my needing it to be loud and also why I don't want to use combustion. It will not be relatively close to the path. I would never risk injury to anyone.

After reading over some of the posts on this site I am convinced this is the place to go. Here's the situation. I have a charity haunted house coming up at the end of October and they want something along the lines of a LOUD spud cannon. There will be no projectile involved (until later :lol:). It w...