Jet & Cones (Flamethrowers, Fire Extinguishers etc.) in Vacuum and/or Zero-G?

[vicky_molokh]

Greetings, all!

Our party is preparing to get into a spaceship wreck. Microgravity/Zero-G/freefall ensues, and there is no atmosphere in some of the compartments. But we're likely to have a need for at least one liquid/aerosol-spraying weapon - possibilities include a fire extinguisher (UT83, HT29), a spray can/tank (UT134), and/or a vortex ring projector. Yes, I know a VRP is neither a Jet nor a Cone, but title string length is limited.

So, what I'm interested in:
What are the effects of zero-G, vacuum, and both, on these different Liquid Projector class weapons. I'm guessing that a significant reason for the extremely short range of fire extinguishers is the gravity-caused falling of the projectile substance. OTOH, it seems likely that for spray-cans and vortex ring projectors, atmospheric interaction is a significant factor. And it's not clear whether a default vortex ring will keep flying indefinitely in vacuum without rotating, or change into a Cone under the pushing-outside effect of the gas. Or whether a VRP can have a vacuum-mode that does not form a ring, but rather launches the substance in a more vacuum-appropriate way, say, comparable to a flamethrower jet, a spitting cobra-style burst or whatever.

Thanks in advance!