View Full Version : Kind of OT: Anyone into carbide cannons?

10-28-2013, 07:36 PM
I have a couple of the real Big Bang Cannons from the Conestoga Company, here is the link for anyone not familiar http://www.bigbangcannons.com/ . One of the models I have is similar to the 15c but I believe it is smaller, I don't see it listed as a current model. About 10 years I decided I wanted to build my own and made it roughly twice the size as the one I have. I basically doubled all of the dimensions. I tried firing it a couple of times but could never get a good bang out of it. I didn't think about it at the time but I have a feeling the volume for the barrel size vs. the chamber is way off since I doubled the dimensions instead of figuring out the volume of them to start.

Anyways, even though it is "finished" I would like to redo it to get some proper noise out if it. I have also had on my mind for quite some time to do one out of brass of stainless(or 1 of each). Does anyone know what ideal chamber size to barrel size/length should be to get the loudest "bang" out of one of these? Here is a picture of the one I built, not a very good one but I had it on photobucket. No machining was involved in that project, and very basic and minimal tools were used.

http://i296.photobucket.com/albums/mm177/klx411/002-6.jpg (http://s296.photobucket.com/user/klx411/media/002-6.jpg.html)

10-28-2013, 09:56 PM
Sounds like the easiest fix would to sleeve the barrel back to original size, or double the charge.

10-28-2013, 10:19 PM
I have a Black Powder Mortor that shoots golf balls, lots of fun!

10-28-2013, 10:51 PM
That's cool! I never knew Bridgeport made mortars!:p

10-28-2013, 11:32 PM
BridgePort makes all good things!

That's cool! I never knew Bridgeport made mortars!:p

10-29-2013, 10:56 AM
Used to make them all of the time. A piece of muffler tubing, weld the end shut & punch a small hole in it to touch off the gas. I had one clamped to a transmission jack once, it fired oranges about 100 yards. The best ones were made of scraps of muffler tubing, one over the other, and a 1/2" steel gun carriage. That one fired golf balls. Of course, my boss confiscated it when I scared the guy at the used car lot across the street. He usually took a nap in an RV on the lot. I bounced a golf ball off the side of it, and he thought the world was coming to an end. Of course, we didn't use carbide & water...just acetylene gas, from the torches.