Alright, this is something I don't get.

For years, fields have not allowed combustion fired spudgun type launchers for scenario games.

But since the C-3 has legitimized propane as a fuel, shouldn't it be totally acceptable to use it in properly-constructed launchers that consistantly meet a certain velocity? I mean, if it isn't going to explode, and it's ot going to have velocity spikes, why not allow it? It'd be a lot easier to deal with the fuel source considering most scenario launchers use CO2 or HPA at a rediculous rate. This would make a paintball mortar, tank or howitzer a lot more feasable.

Just figured I'd toss it out there.

tippmann has researched propane for a while now...  most other people havn't gone that in-depth with it and don't know it's dangers...  it would be neat though.

 Just don't get to close to an open flame while firing your marker! LOL.

(I can't beleave my profile still works after this long)

So does the new marker actually internally cumbust the propane in order to propel the paintball, if so how do they keep the paint from melting.

( Sorry for all the stupid questions, I havent done much reaserch on it.)

The problem with other propane powered launchers, especially spud gun type....is velocity regulation. This is my guess anyway. You're able to regulate the velocity on a C-3, and unless you can do the same with a home made launcher, I don't see it being allowed. This is the only real problem that I can see.

Has anyone heard of any fields that don't allow the C-3? 

I was considering the feasability of constructing a system similar to the C3 as far as velocity regulation. It's easy enough to regulate the amount of fuel used. It shouldn't be too hard to find a way to restrict chamber voulme if not going through the whole spring loaded piston thing.

Either way, I'd love to see a Mk 19 type automatic launcher some day. It'd be great for getting people out of bunkers and moving.

I forgot where I read it, but I believe Bruce A. Frank has a post somewhere on the complete workings of the C-3. 

BUT, Snake6 is right, the combustion is contained in the combustion chamber, however, it does vent the spent gas (it has too, otherwise it wouldn't shoot again).  I believe (don't quote me on this) but when you pump the gun, it does two things, vents prior spent gas AND releases another burst of propane, to be mixed in the combustion chamber.  Also, as far as not melting the paint, it's a burst flash combustion, not a sustained fire.  So it won't get hot enough to melt the paint.  If you look on my webpage, I have built propane spud launchers and have never had a problem with heat and melting the PVC or the paint (although I should at a rate of about 1 projectile per every couple of minutes).

junojpeg wrote: I have a spud launcher, and in the scenario of the game, we accidentally put too much scotch gard in the chamber, we shot it at their base, and it went through the fresh wood we used to build it. But we still use it anyway. We use it to make them get behind their bunker so we can move up.

You want power (not recommended for paintball, however), try ether.  But be very, very careful.  I put no more than a half second squirt in a 4" x 10" combustion chamber, and I can poke a hole through 1/2 plywood, with a nerf football....