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Big ghetto pneumatic (40ft barrel :)
Posted: Fri Apr 20, 2007 7:44 pm
by Fnord
I've had this thing together for about 6 months, but had recently taken the valve off for part of my contest gun. I got another valve a few days ago and put it together today.
The tank is an old water tank which is 16"x 48", and the barrel is two sections of 1" steel well pipe.
I only got to fire it once today, but I have included pictures damage from last year. today I just fired a piece of pipe at a slab of steel to clean the dirt out of the barrel.
I doubt its as powerful as the
swat gun, but the price was right ($15 for fittings and valve lol)
The forcast in ohio is finaly warm this weekend, so hopefully I'll get to have some fun for the next couple days.
Give me ideas of what I should shoot!
Posted: Fri Apr 20, 2007 7:56 pm
by Velocity
Very nice cannon! Usually, I would rant about the ball valve, but considering that you have a huge chamber and barrel, I honestly feel that if you used a QEV or sprinkler valve, you would only be decreasing performance.
Once again, very unique design... I really enjoyed seeing this gun!
Posted: Fri Apr 20, 2007 8:08 pm
by VH_man
DAMN thats powerful........... the projectile even heated up......... WOW. i think you should make a high-pressure piston valve for that thing, and pressurize it to like 1000 PSI........ it would be like the Small Bore Swat Gun. What PSI do you fire it at?
Posted: Fri Apr 20, 2007 8:10 pm
by TwitchTheAussie
Damn that thing is big. I wouldnt like to be hit by a bit of pipe like that poor tree. Good work :thumbright:
Posted: Fri Apr 20, 2007 8:17 pm
by Fnord
The shot today was only at 80 psi.
There is NO WAY I would put 1000 psi in that thing
Tanks like that normaly only use about 60psi, but this one is tested to 200.
Posted: Fri Apr 20, 2007 8:35 pm
by XxtriviumxX
WOW that is a big gun, it put a nice hole it that tree to. Good work
Posted: Fri Apr 20, 2007 9:19 pm
by From_Hamsterdam
that is so awesome. Fill a pipe with lead
Posted: Fri Apr 20, 2007 9:24 pm
by schmanman
nice.
I dont mean to sound gay/retarded/jerky, but thanks for the acknolodgements everyone!
damn, now I have to get a 60 foot marble barrel!
*waits for chaos*
Posted: Fri Apr 20, 2007 9:57 pm
by PVC Arsenal 17
Shit that thing is big. I've always wondered what would happen to a Barbie doll travelling at high velocity. Please shoot one and let me know.
Posted: Sat Apr 21, 2007 3:38 am
by mega_swordman
Why, yes. That certainly is very big and ghetto. Have you tried
making cannonballs for this cannon yet. It certainly would be rich to see the damage of that considering what you did with that pipe. Kudos to you.
Posted: Sat Apr 21, 2007 7:51 am
by scatdawg
the bigger the better. that thing is awesome
Posted: Sat Apr 21, 2007 8:37 am
by schmanman
PVC Arsenal 17 wrote:crap that thing is big. I've always wondered what would happen to a Barbie doll travelling at high velocity. Please shoot one and let me know.
I did that once.... or twice...
It went through several sheets of 3/4 inch plywood, but the barbie ended up in lots of little pieces.
the hair was ripped off, and the face was mutilated and torn.
Posted: Sat Apr 21, 2007 11:19 am
by frankrede
wowsa.
So is there hang time from when you open the valve and when the projectile leaves the barrel?
Posted: Sat Apr 21, 2007 12:21 pm
by Fnord
Not much, but it depends a little on the projectile weight. maybe 1/2 a second at the most.
Posted: Mon Apr 23, 2007 8:48 pm
by Fnord
Here are a couple damage shots I did over the weekend. I took videos too, but right now I dont have a fast enough connection to upload them.
In addition to the pictures below, I shot 3 gallon jugs lined up and filled with water. The projectile never even noticed they were there, and continued on its path to rip trenches into my yard.