Ok, so here's the deal. This summer has been a summer of ups and downs, and it's almost over (school starts in less than 2 weeks). I haven't done too much this summer as far as spudding is concerned, but I would like to make up for lost time and actually build something cool before school starts (or...

Nice! Is that your own type of pilot that you built there? I'm a lil confused. i see the schrader...but what is the pipe in front of it for?

Wow. 3000 ft/lbs is pretty damn impressive But yeah, why is the video so shaky and psychotic?

Lookin good there!

After seeing the multitude of pen guns posted in the last few weeks I decided to try building one.

Lol, yeah...what is up with pen-guns gaining popularity like crazy all of a sudden? (I'm guessing JSR is behind it somehow) lol

It looks pretty nice. The stock looks kinda small, but whatever works for you! I like it!

Never said you did, just pointing out that I never "invented" it either
What's this going in then? High pressure small calibre single shot pistol/rifle?

Haha, ok, I gotcha!
Ummm, I'm planning on making it into a .25 cal. handgun of some sort I think.

nice design have considered using oring seals instead ? Ummmm...I'm using inner-tube, and that has worked well for me before... The idea of a "spool" type piston is several hundred years old so nothing new under the sun. Looks very neat, I'm guessing you'll be taking it to significantly high pressu...

well so far it looks good... ohh that one vote for 'Scrap the project immediatley before I make you!' is mine... lol sorry but it was so tempting

Thanks! Haha. did you like those poll choices?

Its a toolies valve, it has been made a couple times before on this site. Wiki

Oh wow...so it is! I had never seen that before! As i said, I just saw the design on JSR's Pneumatic Cartridge design thing. I had never seen it used before on this site...but i guess I was wrong! Ah well...

Hmmmm, i dont realy understand how it works. Interesting though.

EDIT: oh i do now, just looked at the link...

Good So what do you think?

Ok, I have been working on my in-line piston design for quite a while now, a few months at least. I know that in principle it would work, but the problem was that it was kinda difficult to get it to work :) . Well...today was a very hot and humid day (Heat index of near 110 f) :shock: and I really d...

OOOOOOOOHHHHHH. I understand now!! I looked up what I hole saw is. I gotcha now, I just didn't know what a hole saw was...now I understand. Good Idea!

Still, don't really get ya, got any pics? What kind of saw are you using?

If you're just going for a crowd-pleaser, I would go with a combustion cannon. For performance, i would go with a pneumatic.

Last night i was using my 2' cannon to launch 2x2s

I assume you mean your 2" cannon?
I'm kinda confused as to what you are explaining though...