portable pneumatic potato gun no co2 or n2 or compressor

[trae08]

Ok well i was just sittin here on my comp an i was thinkin about a new portable way to shoot a gun then i thought what if u take a 4 inch by 6 inch pice of pipe put a plug on one end an a clean out plug on the other fill it with vinegar an pour in the baking soda then seal it shake it an let it fill up just an idea.
or u could even use a smaller piece of pipe

[)DEMON(]

It would not be very efficient, not to mention it will make one hell of a mess. You would be better off making a small pneumatic cannon and mount a bike pump on the bottom. You could make a break barrel spring action one like an air rifle or you could just go co2 wize.

[x.X.Cpt.Rollhart.X.x]

Oh dont hurt yourself with your powerful portable pneumatic

[SpudStuff]

can you cay dry ice and water

[carlbelcher]

If you choose to use baking soda and vinegar, or dry ice, or even hydrogen peroxide and metal make sure you use a safety blow off valve, because any of these reactions are capable of producing more pressure then PVC or even sometime metal pipe can withstand. Also keep in mind that PVC + COLD (Dry Ice) = BAD!

[Brian the brain]

Or use coca cola and mentos..

[trae08]

peroxide an what kind of metal?

[Brian the brain]

Or alcohol and chloride?

Although the fumes will make you vomit immediately...

Might be a nice deturrent or sumthin'

[carlbelcher]

Hydrogen peroxide reacts with any metal, even the highly diluted stuff you can buy at pharmacies will produce a gas when it comes in contact with metal.

[Mihlrad]

Or alcohol and chloride?

Although the fumes will make you vomit immediately...

Might be a nice deturrent or sumthin'

and you might also end up with a missing limb or two dont forget that.


not to knock your idea, but its pretty pointless because all of these things can not be regulated to stop at a given level, and are no more portable than any other idea...

[boilingleadbath]

God...

I've calculated the case for acetic acid and sodium bicarbonate. It costs about .5$/3L at 100 psi.
____________________________-

HOOH (hydrogen peroxide) costs me about .25$/mole over here (America). And that's at it's cheapest (pool-grade, not medical grade, which is about 1$/mole).

Thus, it costs .5$ or so to fill a 3L chamber to 100 psi. A bit better than a CO2 cartrige, admittedly, but not cheap.

Metal? The only metalic catalists I know of for the decomp. of HOOH are silver and platinum - neither of which are cheap.
Use MnO2... it's pretty effective stuff.

If you can't figure out how to get it, you shouldn't be playing with pure O2 at 100 psi.
__________________

Oh, and Brian... mixing R-OHs and clorides doesn't release any fumes.
Perhaps you ment hypoclorates? (which might, although I'm not certain)

[carlbelcher]

The primary factors contributing to H2O2 decomposition include: increasing temperature (2.2 factor increase for each 10 deg-C); increasing pH ( especially at pH > 6-8 ); increasing contamination (especially transition metals such as copper, manganese or iron); and to a lesser degree, exposure to ultraviolet light. In most cases, pH and contamination work in tandem as the dominant factors.

http://www.h2o2.com/intro/faq.html

I think that pretty much includes most metals, including both ferrous and non-ferrous.

[M3NT4L]

wouldent a mini bike pump atached to a little blogun activated gun be more effective less messy more powerfull and not smell like ...crap