SpudFiles

This is my pneumatic and it has a 3" chamber 24" long. There are 2 3/4" sprinkler modified for pneumatic actuation by the blowgun. I have 2 barrels to use with gun. A 2.5" tennis ball barrel 48" long and a 1.5" barrel 48" long. I use these barrels on this gun and on my combustion. Damage pictures will come later.

EDIT: Posted damage pictures.

That looks like it could do some cool damage, nice gun although i'm leaning towards "hating" the paint job. In my opinion a camoflauge pattern would be the nuts. I also like that you use two valves.
I shall rate it a 8 out of 10- two points deducted for the wacky paintjob

sweet gun the paint job looks like a candy cane though

Thanks guys this was easier than camouflage.
More comments please.

Damage pics equals more comments

Ok im working on the damage. Im leaning towards shooting a bolt at wood.

Hi,

You´ll need larger pipes to and from the valves.. My comment.

Nice otherwise..

Regards
Soren

looks like a cool cannon. Well done

I realized i made a constrictive setup the second after the PVC cement set.

I actually quite like the paint job... I see too many camo colour schemes, and not a lot of them are actually particularly good.

It's nice to see something different.

Yea Joanna, i like it to. Nice launcher, 5 lbs, thats a nice chunck of metal to be sailing through the air, could you see it flying? Or is that a dumb question. Post some video's if you can.

Well at a 45 degree angle it goes like 80' so i will get a video. Yah u can see it fly.

jrrdw wrote: could you see it flying? Or is that a dumb question.

Well, I find that things usually become hard to see at 100 m/s or more... but this is a lot larger than what I use, so you'd need to be going even faster.
So that would be 20,000J of kinetic energy or so to make it "invisible". At a decent 20% efficency, that becomes 100,000 J of chamber energy.

And that would need a 11 gallon chamber at 300 psi to provide that amount of energy. But for the actual chamber size, you'd need over 5000 psi and a 7 foot barrel. So, yes, it would be a little optimistic to get it so that it wasn't visible in flight.

joannaardway wrote:

jrrdw wrote: could you see it flying? Or is that a dumb question.

Well, I find that things usually become hard to see at 100 m/s or more... but this is a lot larger than what I use, so you'd need to be going even faster.
So that would be 20,000J of kinetic energy or so to make it "invisible". At a decent 20% efficency, that becomes 100,000 J of chamber energy.

And that would need a 11 gallon chamber at 300 psi to provide that amount of energy. But for the actual chamber size, you'd need over 5000 psi and a 7 foot barrel. So, yes, it would be a little optimistic to get it so that it wasn't visible in flight.

Well, hehe, thats a lot of figuring there Joanna! So Spudgunner. Can you mod it to those specs or not?

where do you atatch the barell, i realy dont get it.