My first spud gun
- farcticox1
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I'm not a combustion guy but pictures would be good
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Sure thing I’ll post a pic of 2 of my 3 spud guns.
It might be a while because I’m currently away from a proper computer and the editor doesn’t work very well on an iPhone.
It might be a while because I’m currently away from a proper computer and the editor doesn’t work very well on an iPhone.
Last edited by Potato Demon on Fri Nov 02, 2018 12:50 pm, edited 2 times in total.
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Ok here’s a picture of my first 2 potato cannons. The big one was my first one the small one was my second. They’re both solid core abs. I get my abs from home hardware, Home Depot where I live only has cellular core abs for some reason.
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The tape on the chambers is for grip.
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- jackssmirkingrevenge
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Primitive but still fun what's your ignition like and are you metering your fuel in some way?
hectmarr wrote:You have to make many weapons, because this field is long and short life
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My ignition is two small nails and the piezoelectric thing from a bbq lighter. They work pretty well and I use hairspray or deodorant in them. If anyone knows of a better fuel let me know.
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I could send a picture of my third combustion and when I finish it my first pneumatic.
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First pneumatic is built I will post pictures tomorrow if anyone want me to.
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- jackssmirkingrevenge
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syringe metering ftw!Potato Demon wrote:If anyone knows of a better fuel let me know.
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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I haven’t tried syringe metering yet, I just count to 10 quickly and then stop spraying. I just made a spud gun with a 4”x1’ combustion chamber and a 1 1/2” x 3’ barrel btw.
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- farcticox1
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Yes, I likes pneumaticsPotato Demon wrote:First pneumatic is built I will post pictures tomorrow if anyone want me to.
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Ok here is a picture. I’m waiting for the cement to set (transition cement). The only reason I built it with ABS is because I had some scrap. I know that abs isn’t the best for pneumatics but if it fails it ruptures and I could probably salvage the valve with a saw and a core drill bit (or whatever it’s called). This is solid core abs by the way. I used the valve from some scrap inner tube and drilled a hole in the chamber that was smaller than the valve, then I put the valve into my drill and held it to the hole and turned on my drill. Because of the rubber on the valve it fit perfectly. I added a ton of hot glue just to be safe.
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- farcticox1
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So the ball valve is the trigger? They work really well when spring loaded, then you can have a better trigger
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I was actually trying to figure out how to spring load it. What I have done to make it easier to turn (haven’t got around to firing it yet) is I put a thin layer of Vaseline in the ball valve and that seems to help a little.
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- farcticox1
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You'll need to make some kind of linkage. Attach a spring to the valve handle somehow, maybe need to extend the handle? then someway of locking and releasing the handle or spring.
This is one I made but it did get complicated
This is one I made but it did get complicated