Search found 747 matches

by jeepkahn
Sat Jan 17, 2009 10:53 am
Forum: Pneumatic Cannons
Topic: How To: Know When Your Soda Bottle Chamber Is About To Blow
Replies: 50
Views: 1980

typical soda bottles burst at 300psi, as far as the "works/drano" bombs, I think discussion of them is one of the forum no/nos....
by jeepkahn
Fri Jan 16, 2009 10:49 am
Forum: General How-To & Discussion
Topic: Any Regulars on here from NC, USA???
Replies: 7
Views: 470

Mr.Sandman wrote:where in nc do u live? i live in viginia beach but for two months of the year i am down in raleigh
I'm about 1.5 hours from RDU, I live near reidsville, northeast of greensboro and northwest of burlington...
by jeepkahn
Thu Jan 15, 2009 4:58 pm
Forum: Pneumatic Cannons
Topic: Doing some testing, Soon.... updated 02-10-2009..Damage pics
Replies: 31
Views: 1667

I think you'll see that with proper planning, a couple of hours is all that are needed to build a gun properly... Using standard parts, perhaps, but sadly I'm of the epoxy mindset, a versatile material but it turns hours of building time into days of waiting :roll: I shave a lot of time in the pist...
by jeepkahn
Thu Jan 15, 2009 1:39 pm
Forum: Pneumatic Cannons
Topic: Doing some testing, Soon.... updated 02-10-2009..Damage pics
Replies: 31
Views: 1667

[quote="jackssmirkingrevengeVery ambitious, hope you get it right the first time ;) [/quote] Thanx... When I get the build pics posted I think you'll see that with proper planning, a coupla hours is all thats needed to build a gun properly... BUt I'm also a middle aged OCD enabled overthinker... :D
by jeepkahn
Thu Jan 15, 2009 11:06 am
Forum: Pneumatic Cannons
Topic: Doing some testing, Soon.... updated 02-10-2009..Damage pics
Replies: 31
Views: 1667

Doing some testing, Soon.... updated 02-10-2009..Damage pics

Alright Guys, I'm picking up my materiels for my GB gun this afternoon and plan on having it done by tomorow, and since you guy's seem to be all about some pics/video/damage shots(who isn't?), I've got a video camera lined up for sunday... Specs on the gun: 60" sch80 with sdr21 inner barrel, 36" cha...
by jeepkahn
Wed Jan 14, 2009 5:29 pm
Forum: General How-To & Discussion
Topic: Any Regulars on here from NC, USA???
Replies: 7
Views: 470

Any Regulars on here from NC, USA???

Just curious, I'd be interested in getting together with other spudders to, as my wife says "see how far you can shoot random stuff"... It'd be cool if we could get several together and do some video's and such(if someone can bring a vidcam)... I know I've piqued the interest of a few on here with m...
by jeepkahn
Sat Jan 10, 2009 2:24 pm
Forum: Pneumatic Cannons
Topic: large volume pilot valve....CHEAP!!!
Replies: 19
Views: 1484

And my question is how much does that affect acceleration??? Well, that would be a function of the speed of the projectile. In a normal barrel, as the projectile speeds up, the air in front of the projectile compresses more and more until the point where the projectile is nearing the speed of sound...
by jeepkahn
Sat Jan 10, 2009 1:12 pm
Forum: Pneumatic Cannons
Topic: large volume pilot valve....CHEAP!!!
Replies: 19
Views: 1484

You should really get a video up of the operation in progress. I've been here 3 years and never seen anything like this yet. Very interesting concept. I actually got the idea from my grade school son's science fair, if you google ping-pong cannon, you'll get the idea... it's a science project where...
by jeepkahn
Sat Jan 10, 2009 10:42 am
Forum: Pneumatic Cannons
Topic: large volume pilot valve....CHEAP!!!
Replies: 19
Views: 1484

Once the projectile reaches the vacuum port, would it not hinder the projectile at that point in travel? Being as how the vacuum port is off the side of the barrel, instead of straight out of the muzzle. the vacuum port is 3/64" located .5" from the exit end of the barrel, and I close the valve at ...
by jeepkahn
Sat Jan 10, 2009 9:29 am
Forum: Pneumatic Cannons
Topic: large volume pilot valve....CHEAP!!!
Replies: 19
Views: 1484

I'm just trying to figure out WTF "vacuum assist" is. the gun referenced is a 72"x1.5" barrel attached by a 1.5" high pressure butterfly valve to a 5gal 200 psi rated steel tank.... when firing with vacuum assist, I use a "burst disc"(actually it's the bottom from a plastic cup with sealing grease ...
by jeepkahn
Fri Jan 09, 2009 3:31 pm
Forum: Pneumatic Cannons
Topic: large volume pilot valve....CHEAP!!!
Replies: 19
Views: 1484

Re: large volume pilot valve....CHEAP!!!

NO piston honk on my gun... So? In many cases "honking" has nothing to do with the performance of the gun. The "honk" only occurs after the ammo has left the barrel. I was refering to the fact that it doesn't honk even when I have active supply still hooked up... before I was using a blowgun for th...
by jeepkahn
Fri Jan 09, 2009 1:41 pm
Forum: Pneumatic Cannons
Topic: large volume pilot valve....CHEAP!!!
Replies: 19
Views: 1484

large volume pilot valve....CHEAP!!!

I been watching this forum for a few weeks, just registered today... What I'm using on my 1" coaxial gun is a high quality garden hose sprayer slightly modded since I'm not worried about spray patterns, it's rated at 150psi and I mean to tell you there is NO piston honk on my gun... now to use a spr...