@jimmy, I did this, but he says the time it takes to take the syringe off the butane tank and to put your finger onto it, all the butane is already lost. Well, tell'm he is 100% wrong. Even without a needle a typical syringe is gong to equalize pressure almost instantly (which is good) and then slo...

Crna Legija wrote:just make sure you get the amount off fuel right on the first shot lol.

Yeah, I'll measure it and do the math and everything

Ah don't worry guys, I'll have the whole thing documented

Thanks for the replies guys, @jack, actually, that last video with the demonstration, that's the one he called a hoax. Thanks for the vids! @Technician, I've been telling him that the loss is negligible, but he doesn't get it. @warhead (and jack), I actually tried this, and I got a nicely sized flam...

I can't find it, would you mind posting a link?

I've been trying to tell him this, but he won't have it. What he wants is cold, hard proof.

Hey guys, I've reached a sort of stall here with the development of my first Spudgun. I've been having a debate with my dad about the Syringe loading system which I was planning on using. He says the syringe injection system does not work, as the Butane will escape from the Syringe when it is remove...

That looks fantastic, however then it would be self-redundant if I wanted to open the back of the combustion chamber using a ball valve or something to vent the exhaust fumes out of the chamber, I could just do the syringe injection into the open chamber after having vented out the exhaust using the...

I was planning on screwing the hole shut, but the ball valve idea looks pretty neat. And with that, I'd be able to use the fan
Now all I have to do is get some materials...

Hmm, I think I'll use the method on the right, plus a hole in the back. That seems a bit more accurate rather than jamming the projectile in after putting the butane in the barrel. Actually, that method doesn't seem too bad. I'm not breech-loading anyways, so it would be a bit integrated. Plus I don...

@jack,
For some reason I can't watch that video, it says EMI records has blocked it on my country

@Moonbogg,
Yeah, I'm looking into a fan, my only worry is that it'll break, but it seems everyone's reassuring it won't, so I guess I don't have to worry about that.

Fantastic, I love the breech loading mechanism, and the gun's got a steampunk-looking style too! And that's one of the best damage vids I've seen. Great work!

Looks really great, I like the breech loading mechanism!

Actually, I was planning on using Axe

So when I have the chamber volume, I get 3% of it, fill that much of it with butane in the syringe, put that through a hole in the back, and I'm good to go? Sounds good.
EDIT: Forgot to screw the hole shut. My bad

I had in mind making something like in the video, with some additions like a folding chamber fan which I found too cool to pass up, and the syringe injection system seems like a nice and easy addition. The only problem with that is then butane or propane would probably be involved, and I don't know ...