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Movie special effects spudgun

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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Unread postAuthor: sirspuddest » Sun Jul 27, 2008 2:04 pm

Wanna blow the house up, and have a nice fireball to boot?

Take a film canister, and fill it about a quarter of the way full with flash powder. Then, take a plastic sandwich bag, and cut the corner off of it, fill the cut off corner with a bit of gasoline, and stretch it over the mouth of the canister and put the lid back on.

To safely detonate it, take a small piece of a carbon mechanical pencil refill rod, and attach two wires to it, and insert it into the canister vi a hole drilled in the side. When you're ready to detonate it, attach each end of the lead to opposite contacts on a portable drill battery.

That's how some of the movie guys do it, minus the ghetto detonator.
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Unread postAuthor: starman » Sun Jul 27, 2008 2:21 pm

Good info. Estes rocket ignitors a little more reliable and safe....

Probably borders on passing the no-discussion rule re. powder/explosives....but no spud gun usage was mentioned in association.
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Unread postAuthor: sirspuddest » Sun Jul 27, 2008 9:28 pm

starman wrote:Good info. Estes rocket ignitors a little more reliable and safe....

Probably borders on passing the no-discussion rule re. powder/explosives....but no spud gun usage was mentioned in association.


Yeah, Estes ignitors would be awesome. Didn't even think about those. Good idea.

I was hesitating on posting it, but like you said, I didn't mention anything about firing it from a spud gun or anything, so I figured it was safe to discuss. Also, it doesn't involve an uncontrolled explosive (like with a Drano bomb).

If any mods object to the info being up, then I'd be glad to take it down.
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