Big Red Dog 12 posts 02-08-03 03:40 Reply	I want to build a blast cannon, and I have some designs for one that will put a frozen orange 3 inches into plywood from 25 feet away... from my estimates that would generate some 500N of force on the shooter, so I'd like to make it into a mobile turret kinda thing... Anyone know of any such designs? Especially one where you can change the angle of inclination of the barrel for firing? Any really good designs for better cannons?
Nick Peaden 41 posts 02-24-03 04:33 Reply	Really, you guys have never been to a rural area enough. 3" PVC pipe, 1 end cap, PVC glue, drill, hair spray (or other HIGHLY flamable vapor), matches, potato. Assemble pipe and cap, insert potato, fill hole that was drilled out by drill (small hole) with propellant, strike match , light, you just sent a potato at lethal (or near) velocity for 100 - 200 yards.
Xathien 1255 posts 02-28-03 02:13 Reply	Instead of using hair spray, I'd use rubbing alcohol or some other type of alcohol (possibly rum or brandy). Alcohol has a tendancy to burn for long amounts of time, and it flares up really fast. Hair spray, on the other hand, can take a few tries to ignite properly.
Jbirk 54 posts 04-06-03 08:05 Reply	Do exactly what the guy with the PVC pipe suggested, but use B-12 carberator cleaner, or starting fuuid. Why use B-12? The warning labels take up half the can. It says explosive, flamable, can freeze skin on contact... and the list goes on. Now, for the the other reason, the stuff turns to vapor almost imediatly. You can see it evaporate off of anything you spray it on! So, pull off the cap and put a wd-40 cap on it with the straw, inseart your patato then put the straw in the hole and press the button. AFter a quick 2 second spray, remove the can and place it far away from fire then using a 100 metor long match light the hole. Your patato will fly into orbit and/or the pvc tube will blow up. Warning, theis is very danerous. You may end up blind, deaf, and with several hundred pices of plastic in your face, or maybe even dead. So be careful, and the patato shoudl fit snugly into the pipe to prevent blowby :)
Dr. NO 522 posts 10-04-03 08:37 Reply	cool
Whong 9 posts 10-19-03 03:26 Reply	Me and my friend Greg tried to build a cannon last weekend. We were just fooling around, didn't really know what we were doing. It was a 3 foot length of galvanized pipe which we welded shut at one end after drilling a hole for the fuse. As propellant we used a mix we had come across playing with chemicals (can't remember what it was exactly, will tell if I remember). Anyway, to make a long story short, it exploded, Greg's neighbors called the cops after I left and Greg's house got raided and searched by a bomb squad. I got pulled out of class by the ATF for questioning. Greg is being charged with possession and manufacture of explosives (he'll probably get off with some community service, we didn't destroy anything, hurt anyone or put anyone in harm's way), but I've been let off cause the ATF guys like me and I didn't own the chemicals. Moral of the story - Kill your neighbors before they call the cops on you. Bastards.
green 28 posts 10-22-03 23:49 Reply	Pipes work well, but after frequent overusage, they will begin to melt... :.( Just be very careful with such devices, many potatoes have been destroyed upon exit, an orange, I fear, will be less durable and could possibly leave some serious orange goo inside your blast chamber. This means it can build up, and make small weak holes in the pipes, which can make it very easy to lose body parts with a tank of sealed BOOM under your arm.
Dr. NO 522 posts 11-02-03 09:01 Reply	Wouldnt that be great fun. Like the guy who was shot out a cannon and then... oh, wait, I was making that up, but hey, that'd still be bad...(gross goo).......

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