excuse me? do you mean spud gun or "spud gun"? And if the latter, why do your hands smell of gas and alcohol? Is that what it takes to clean off your man fat???
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I have found that to be the best fuel (with oxygen) for a spud gun. Get the torch burning clean, then snuff it out on the bottom of your boot, or something. Then fill your gun. Scares the hell out of me with a PVC gun, though. I think it really tests the strength of the plastic. My friend has a cast iron combustion chamber on his gun. Much safer.
MAPP gas produces similar results to acet. But, I'm pretty sure the burn rate is slightly slower.
<font color=green>I've had enough cookies.</font color=green> <font color=blue><i>Got milk?</i></font color=blue>
Hmm.... well gas/alcohol is the best I've used so far. I put it in a hairspray bottle and give it about 20 squirts. Really kicks hard, I can fire an aerodynamic one about 400 350 feet. (I use a PVC one, about 2 foot barrel.)
Heh, yeah, I guess that'd work pretty well. Has anyone ever thought of using an airbag (like the ones found in cars) to propel a potato? That sodium azide (I think that's what it is) stuff expands pretty quickly...
I've tried lot's of fuel. Gas, alcohol, ether. The thing that makes the acet so good, obviously, is the oxygen. Getting it to burn clean with a torch, assures a good mixture. I'm sure you've noticed, that too much fuel means not enough oxygen and less power. Plus, we get pure oxy in there. Not just relying on the small % of O2 in the air.
I have put acet/O2 in an all PVC gun. But, do be careful. You may be picking pieces of plastic out of your face if you try it It is much safer with iron combustion chamber.
We use a Coleman CampLamp igniter. But, want to switch to electric ignition. What do you use for ignition?
BTW, while the torch is spewing our go-go juice, we sometimes use it to fill balloons (the bigger the better). They make excellent noise makers when ignited. Yeeheehee Besides balloons, we have also tried blow-up toys, air matresses, a blow-up sex doll, and a rubber raft!!!
Kids, don't try this at home.
<font color=green>I've had enough cookies.</font color=green> <font color=blue><i>Got milk?</i></font color=blue>
Hmm.... I'll try it , but only once.... I've already wrecked the threads on the back of the chamber (for the plug you unscrew) more than once and had to rebuild.
For ignition I use a normal automobile spark plug, about 4 inches from the back of the chamber. I have a BBQ starter hooked up to it. One quick press of the button and BLAM your potato is flying !
My hand smells like beef ramen noodles, because I just accidentally spilled a little of my 'instant lunch' styrafoam cup soup. Heh heh. Oops. At least my PC wasn't anywhere near.
Hmm ... thinking of which, what would happen if you were to cook and drain ramen noodles and then put them into a spud gun and fire it? Would they roar out in a coherent blob, or would they not even make it out?
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Styrofoam coffee cups make good "wadding", to propel almost anything. Tear off the top half of the cup to make it the right diameter to fit the barrel. Then pour/dump anything you want in there. I have tried lots of things, from jelly beans to dog crap.
<font color=green>I've had enough cookies.</font color=green> <font color=blue><i>Got milk?</i></font color=blue>
For ignition I use a normal automobile spark plug, about 4 inches from the back of the chamber.
Wow, how big is the combustion chamber you are using?
Our gun looks like this:
2 foot long, 2 inch diameter PVC barrel. threaded at one end. Then screwed into
2" to 4" cast iron adaptor, with
4" long, 4" dia, iron combustion chamber screwed into that.
4" dia, iron cap screwed over the end.
Cap is drilled and tapped for 1/2" pipe plug (fuel fill).
Cap also has 3/16" (or so) hole in it, that is for the sparker. (I like your ign. better)
This unit is very strong. If you are blowing out the cap on yours, with your fuel, I don't recommend using acet/O2. The acet/O2 goes, at least, 50% farther than any other fuel we have tried. Never measured, but guessing 500-600 feet.
After one shot in an all PVC gun, I would not stand anywhere near it. My friend popped off several more shots with it. But, we both agreed to upgrade to iron. We may be stupid, but we ain't dumb
<font color=green>I've had enough cookies.</font color=green> <font color=blue><i>Got milk?</i></font color=blue>
My chamber is much larger than yours.... mine is a little over a foot in length, and 5" diameter. Just the chamber. The barrel is about 2.5feet on to that. so this thing is quite large, like a bazooka
Mine fires good enough for me, besides if I had an iron chamber as big as mine it would weigh a ton.
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Bourbon, damn shot glasses. Always spill a tiny bit if you dont get the bottle titled right. Wild Turkey and Mountain Dew makes for a great little drink.
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I made a spud gun years ago and used carb starter “ether”. Just one tinny squirt seemed to give the best results. We were shooting the spud well over 400 yards.
My hands smell like crap now, well that is what happens when you use cow manure on your lawn. Yum-yum. OOps I should have washed my hands before typing.
That sounds like a drink that my friends used to call "Hillbilly Piss", except they used Mellow Yellow whenever possible, probably just for name's sake. Of course, just to be gross they'd purposely mix it in the 20oz transparent plastic bottles.
-Intelicide: The act of marketing overriding engineers to kill a product before it can be released.
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