Dry Ice Cannon
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Uploader Comments (djphibes)
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put a canister of airsoft pellets and watch it go!!
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If you reduce the diameter later on maybe 15mm this means a speed of ca. 550 m/s on a 40g projectile, with same measurement of detonation camber and shaft....
and keep well distance. and a remote controled ignition would be very wise...
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you should devenitly be using a steel pipe and weld a cap on the end. but you should be aware of the power.
a thick PVC bottle can devellop a pressure of ca. 22 bar.
in a pipe (7cm diarmeter) this produces a acelaration to ca. 225 m/s in a 60cm long shaft
means a kin. enery of 2500 J for a 100g projectil.
this is about the energy of a NATO armo...
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yeah or use steel pipe with a threaded end, apply glue to the threads, and put on an end cap.
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couldn't you use PVC glue on the back end you make the cap stay on and never come off? i would probably launch farther also because there would be more pressure pushing out the front of the barrel.
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You must really know what you're talking about. Great suggestions.
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Very good point. Hopefully that second round would blow before contact with the ground.... or at impact :-D
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u can solve that problem by loading a dry ice bottle with warm water first, followed by one with cold water. that way the propellant explodes first
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eh.. using such a poorly built combustion chamber on the ground was questionable but holding the thing on your shoulder => not very wise. you should be using at least a single layer of sch. 80 for the ground with a very secure SINGLE PIECE end cap. if you insist on holding the thing, you need a multi-layer sch. 80 pvc beast... or you could build it out of cast iron and not have anything to worry about :)
Ju5tATh0ught 4 years ago
we don't want a half ton behemoth cannon... lol.. but point taken.
djphibes 4 years ago
u shot the bottle or something else outta launcher? didnt u cover the back of the pipe?
kennlimbhsss 4 years ago
this was a demonstration round, there was no projectile. Our second vid shows us shooting another bottle out. We did cover the back of the pipe, but it just kept ripping it apart. I plan on making a new cannon soon, and using some heavy duty 2-part glues to help hold it together..
djphibes 4 years ago