Klondike? I live on ohio and im not sure what your talking about. We have lake erie in cleveland so we have the lake effect which can alter temperatures and amount of snow.

Its really not that wonderful

Well its a little more complicated than that. When propane, C3H8, combusts it requires 5 moles of oxygen to 2 moles of propane. So for a ratio of how much you need, its a 5:2 ratio of oxygen:propane. So you need 80% oxygen and 20% propane. But you need to account for the 21% of oxygen in the atmosph...

Also refer to this post. This should clear things up on how the check valve works.

Interesting, i have been researching railguns recently and have put in some thought about making one. But i would still need to learn more about its operation and electronics, but i do know the general concept.

Now can you tell me what are you using a triggered burst disc injection for?

Common Sense finally gave up the will to live, after a woman failed to realize that a steaming cup of coffee was hot. She spilled a little in her lap, and was promptly awarded a huge settlement. Ah, i remember that, the McDonalds settlement for when a woman spilled hot coffee on herself and then su...

Well thats a possibility, that got me thinking. Maybe i can heat the chamber (brass) and then push it through the rubber so that i get a nice piston cut. That might work.

I just got some 1/4inch thick rubber from mcmaster, and i cant find a way to cut a nice piston from the rubber so im curious on how you cut such a nice piston shape.

Well it is about time. It looks nice with clean construction.

What kind of pressure do you use this at?

Well you can do this but it would be better if you did a fuel measurements to find out how much is actually needed for optimal performance. To do this, you just have to do some fairly simple chemistry. The combustion of isopropyl alcohol id as follows: 2C3H8O + 9O2 -> 6CO2 + 8H2O So the ratio of oxy...

Looks nice and promising. Now ill prob get the some 1/4 inch rubber so i can finish my pen gun.

By the way, didnt that leave a hole in your wall?

can we see more pictures of it and the different systems.

This caught my interest when i see that you reached 1000psi.

Impressive as usual.

Didnt know a plum could do that much damage.

Man i wish it was spring here, i want to make a pneumatic inline cannon.

Truly innovative.

I like it, i may decide to do one like this for myself; i need a new large bore, inline cannon.

Well, not be a stickler, but bcarms has this. I use this on my current propane tank. Works great.

I think its great for a first time. Most of the beats ran together pretty good so i give it a thumbs up, as well as the first video.