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Spud gun(potato cannon) ideas??

Discussion in 'The Lounge' started by jekquistk5, Jun 28, 2006.

  1. jekquistk5

    jekquistk5 Weld nekid Premium Member GMOTM Winner

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    Every year my friends have a party were we try to see who can make the best spud gun. Just wondering any tricks you guys use, what you use for fuel , etc.
     
  2. 81K5GUY

    81K5GUY 1/2 ton status

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    propane baby!
     
  3. jekquistk5

    jekquistk5 Weld nekid Premium Member GMOTM Winner

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    I have never tried propane, but I have tried butane
     
  4. mxfireman

    mxfireman 1/2 ton status

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  5. bigbluesuburban

    bigbluesuburban 1/2 ton status

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  6. CustomChevy

    CustomChevy 1/2 ton status

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  7. jekquistk5

    jekquistk5 Weld nekid Premium Member GMOTM Winner

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    why I have no clue what you are talking a boot???

    lol... jk any reason you used air?
     
  8. mxfireman

    mxfireman 1/2 ton status

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  9. 79k20350

    79k20350 3/4 ton status

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    Build sheet:

    1 2' length of 4" pvc pipe
    1 4-5' length of 2" pvc pipe
    1 4"->2" pvc reducer
    1 pvc sewer cap
    1 4" pvc sewer cap adapter
    2 grill ignitors
    piece of thick sheet metal (mount for grill ignitors)
    can of pvc primer
    can of pvc glue
    best starting fluid you can find. i find that the name brand stuff works better

    Space the ignitors so that each ignitors contacts are on opposite ends this will ensure a good burn. (this will allow you to get in more starting fluid and in turn a much better shot) It can be a pain to try and hit 2 ignitors at the same time but it works awsome.

    Pics on mine in a few
     
  10. armyfiredawg

    armyfiredawg Registered Member

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  11. 79k20350

    79k20350 3/4 ton status

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    "It penetrated as cleanly as my...":haha::haha:
     
  12. mofugly13

    mofugly13 1 ton bucket of rust Premium Member

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    The only answer is ether.
     
  13. CustomChevy

    CustomChevy 1/2 ton status

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    Thats why I was the camera man :D


    I can't take all the credit for the design, it was kyle (mister francis from the video)'s second sumester engineering project. Deal he made with the prof was that he would design and build a potato canon that has a muzzel velocity above 250 KM/H (about 155 mph), without using a traditional ignition and fuel design.

    So I helped with the air setup and we clocked that gun with a muzzel velocity of 277KM/H


    it was a proud day :D
     
  14. surpip

    surpip 1 ton status

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    do a search, i did a build up thread
     
  15. uao85

    uao85 1/2 ton status

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    Well I read somewhere that a hairspray powered spud gun builds up around 25-30 psi when ignited and fires a few hundred yards. But pvc can easily hold 250psi.............why not build up just 150psi???? meaning more than a few hundred yards.......try close to 750 yards. And yeah I just built an air powered spud gun this past week. This weekends plans are to attach my air compressor to a blow gun and go hunt'n.

    Remington

     
  16. 81K5GUY

    81K5GUY 1/2 ton status

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    anybody ever tried compressed co2?
     
  17. CustomChevy

    CustomChevy 1/2 ton status

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    has potential (being that it works in paintball guns and such), but you would have to use something much better than PVC.

    CO2 is WAY to cold, and is generally compressed to 800psi (which PVC wont take).


    Though 800 psi would definatly FIRE a spud.
     
  18. stockbox

    stockbox Registered Member

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    spud gun

    We use aqua net hairspray in the blue can not the pink and it works sweet.If you use a pc of 3" instead of 2" u can use the midget size skippy peanut butter jars. :D
     
  19. cbbr

    cbbr 1 ton status GMOTM Winner

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    Yep. But make sure that everything is dry before you test fire it. Say outside of your apartment window. And have the back blow off and through the window. :eek1: :haha:
     
  20. ntsqd

    ntsqd 1/2 ton status

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    I built air powered Spud-Be-Gone for the student chapter SME camping trip in '98. It works a lot like an oxygen regulator. Has a rubber seal/diaphram btwn the coaxial 3" ID reservoir and the breach of the 75" long 1.5" barrel. All PVC with Kevlar weave wrapped around the reservoir. 100 psi works pretty good. 125 psi is marginally better. Any more pressure is a waste of time. At 125 psi a spud goes almost out of sight.
     

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