SpudFiles

I found a broken professional cream whipper and took out the piece that encloses a N2O cartridge that fills up the cream whipper. The threads that went into the cap of the whipper were definitely some kind of foreign threading, but it happens to fit nicely into 1/4in. threads. With a little JB weld, it should hold nicely. So my first question is, can this N2O thing handle a 12 gram CO2 cartridge? If it does work I think I will make the CO2 enter a larger expansion chamber so liquid CO2 won't damage a ball valve on the other end. How large should I make the expansion chamber so no liquid CO2 will be present yet it will be at a high pressure? Here's a picture of the cream whipper:
http://www.zaccardis.com/liss-white-cre ... r-1pt.html

Check the wiki for 12g CO2. There is a chart that shows the gas pressures at certain volumes. Using the ideal gas law, it shouldn't be too hard.

Okay I'll figure out the CO2 volume problem, but does anybody know if the N2O thing is compatible with CO2 canisters?

You can do way more fun things than that with N2O cartridges and a cream whipper (and a balloon).

For the CO2 compatibility, its hard to tell(its not made for it), but you can always try. What pressure is the N2O stored at? If its less then CO2, your cream whipper may blow up.

Nitrous chargers only come in 8g and 16g sizes. A 12g CO2 wont fit in there. And Im pretty sure the pressures in a nitrous charger are much less than the ~800psi (if memory serves right) in a CO2 canister. Seeing as many people put their mouths to those dispensers (for obvious reasons) without much worse than minor frostbite. But that is simply my speculation, someone correct me if I'm wrong.

Seeing as many people put their mouths to those dispensers

But that may also just be because of the low flow.