Dry Ice Cannon

[Alexander] sent in his entry into a “creativity contest” at his university. He and some friends put together this dry ice cannon.  Take note of the creative mechanism they used to mix the water with the dry ice. A large amount of gas is expelled as soon as the two begin to meet. If the gas is supposed to escape through the same opening, it is difficult to get all the material through. They have added a second opening just for the exhaust during mixing. Great job guys. How about some downloadable plans.


  1. The Moogle says:

    woot for illegal weapons!

  2. Alex says:

    Yeah, manufacturing a firearm requires a license in Germany, and a firearm is “a device that propels a projectile through a barrel”…

    Then again, any university with a physics department can get these licenses easily, since many devices used for high-speed impact testing/research fall under the above definition.

  3. l3ravo7 says:

    That is badass BFG. Does anyone know what is name of the music call?

  4. nubie says:

    Is the soda bottle being used as a pressure release?

    Pressure builds until it explodes pop bottle, then the projectile fires?

  5. fusen says:

    l3ravo7 – the song is Motorpsycho – No Evil

  6. EFH says:

    The guy loading isn’t the sharpest knife in the drawer, sticking the old arm in there like that. Gonna be calling that fella “Lefty” someday, you betcha.

  7. JoeBlo says:

    @efh there is no pressure till the dry ice and water are mixed, which occurs after loading the projectile. Furthermore, I believe the gas exhaust valve is left open till the watter is fully added, so even if they were mixed, still no pressure.

  8. ☆☆☆SIKDIDIT☆☆☆ says:

    Yet another weapon engineering advance brought to you by: Unser geist of Germany.

  9. tclover says:

    BFG ))))

  10. barry99705 says:

    Wow, hope there’s a pressure release valve in there somewhere. that thing might go all splody. Fraking cool nonetheless.

  11. barry99705 says:

    @ EFH

    You know where the fire and targeting umbilical is on a hellfire missile? Yea, in the end of the rocket tube. the whole time you’re hooking them up you’re thinking “no stray volts, no stray volts”!

  12. KillerSpud says:

    Maby Tippman will make a paintball marker that runs off dry ice. That would be pretty cool for the next scenario game.

  13. luke says:

    man throw some brass on that thing and take us into the steam punk era already!

  14. Bryan Thielbar says:


  15. therian says:

    potato gun aka spudgun much more practical and seems to have same power

  16. Chris says:

    I made something similar several years ago to shoot potatoes: http://nullprogram.com/blog/2009/07/20/dry-ice-potato-gun

  17. DnD_designer says:

    It’s too much to do Mentos+Cola Gun? :)

  18. blizzarddemon says:

    Dont think the pressure would be high or as constant enough to control dnd_designer. Still its a maybe.

  19. Andrew says:

    I’m bummed I missed this, I’ve been in Regensburg all summer for an internship. Small World

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