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80mm Golf Ball Piston Cannon

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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80mm Golf Ball Piston Cannon

Unread postAuthor: watto » Sat Apr 26, 2008 9:53 pm

So heres my next project, its a 50mm tee golf ball cannon with an 80mm chamber that I'm cutting off my 80mm sprinkler gun, Ive also taken Its sprinkler to use as the pilot. The piston will probably be a 32mm coupler filled with glue like my other one but I'll see how it goes, It's housing will be the inside of this weird hexagonal faucet adapter I found which is the same width as 50mm PN18 so It glues straight into the tee which makes a lot less pilot volume than a normal faucet adapter.

The ETA for this gun is about 1 week, but I should be able to get it going soon with the plug, ball valve and piston from my 50x25 coax to test it. The new 50x25 and 25x15 coax guns are working great I just need to get some video so I can post them in the pneumatic showcase.

The barrel of this new gun will have to be shortened to maybe 1.2m unfortunately cos I need to be able to fit it in my car boot, but I may put a barrel union or something similar just after the tee so I can have more barrel length and interchangeable barrels. I'll test it shooting at layers of wood or something before and after the barrel shortening to see if theres much difference.
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Unread postAuthor: camdaman38 » Sun Apr 27, 2008 7:11 am

Looking good Watto cant wait to to see this one finished and to start mine go for my P plates tomorrow so ill be able to go to city to get some pipe and fittings.

Cameron
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Unread postAuthor: Carlman » Sun Apr 27, 2008 7:23 am

nice one there mate, cant wait for videos aye! :D
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Unread postAuthor: SpudFarm » Sun Apr 27, 2008 7:39 am

nice cannon you got there!
do you have plans on a vid of it?
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Unread postAuthor: watto » Sun Apr 27, 2008 7:44 am

Yep videos will come soon hopefully, I cant get a hold of a camera right now, the guns still in pieces but I might do some gluing tomorrow, I just finished putting a shrader on the sprinkler :D
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Unread postAuthor: rna_duelers » Wed Apr 30, 2008 12:28 am

It's going to look good done,are you going to paint it?

Look out when you fire it for the first time,the sprinkler valves can be very loud when used for porting and you hold it close to your head :lol:

I might suggest loosing the small section of hose though,it deceases the ever important power.

Are you planning to fill that chamber with a bike pump?If so have fun with that haha.
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Unread postAuthor: watto » Wed Apr 30, 2008 12:49 am

rna_duelers wrote:It's going to look good done,are you going to paint it?

Look out when you fire it for the first time,the sprinkler valves can be very loud when used for porting and you hold it close to your head :lol:

I might suggest loosing the small section of hose though,it deceases the ever important power.

Are you planning to fill that chamber with a bike pump?If so have fun with that haha.


Yah I'll definately paint it, even though Ive been very careful about primer stains this time the chamber I'm using from the sprinkler one is black so it would look a bit weird if I didn't.

I'll make the hose as short as I can, so like 4cm, Ide rather have the blowgun tapped straight into the sprinkler but the hose tap is already epoxied and that so I'll just leave it, maybe the shock absorption of the hose will make the gun stay more still when u pull the trigger 8)

Ive been filling that chamber with a steel floor pump for the last 6 months and havnt had a problem it takes about 20 seconds, Ive got a little compressor but that takes 2 minutes :lol:
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Unread postAuthor: JDP12 » Wed Apr 30, 2008 7:29 am

looks really nice, can't wait to see results
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"Some say his pet elephant is pink, and that he has no understanding of "PG rated forum". All we know is, he's called JSR. "
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Unread postAuthor: watto » Wed Apr 30, 2008 9:34 am

ilovetoblowthingsup wrote:looks really nice, can't wait to see results


you and me both m8.

Just tested it under lung power, the elbow and barrel aren't glued but it still sealed and even piloted :D
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Last edited by watto on Wed Apr 30, 2008 7:36 pm, edited 1 time in total.
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Unread postAuthor: watto » Wed Apr 30, 2008 7:34 pm

woops...the delete post function doesn't work...
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Unread postAuthor: bigbob12345 » Wed Apr 30, 2008 7:59 pm

Cool
gun looks great
Cant wait to see it in action
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Unread postAuthor: watto » Sat May 03, 2008 9:13 pm

True to my prediction It's a week later and this gun is finished! The testing went amazingly well, theres been a lot of people around these last few days so I havnt tested it with a golf ball yet but I pumped it to 20PSI in my room with a massive blanket on top of the muzzle, It gave a deafening thump and rattled all the windows even at 20PSI, I remember the sprinkler cannon at 20PSI and it definately was nothing like this, so I'm predicting this gun to have some serious range, I'm hoping for 350-400 meters but the trouble will be finding a park that long to shoot at. :D
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Unread postAuthor: Camdaman12 » Sun May 04, 2008 9:27 am

Looking good Watto cant wait to get to get mine finished should be good for a first.

But yes i cant wait for some Vids and Damage pics.

Cameron
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Unread postAuthor: JDP12 » Sun May 04, 2008 9:31 am

haha nice one watto.... and i dont think you should really have that animation in your sig as well.. the mods might remove it for you.

i certainly don't like it, personally i hate damn drugs
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Unread postAuthor: watto » Sun May 04, 2008 10:01 am

Camdaman12 wrote:Looking good Watto cant wait to get to get mine finished should be good for a first.

Don't you mean 'ours' :lol: I've had more input into that gun of yours than you yourself... so it should be perfect then :P

ilovetoblowthingsup wrote:haha nice one watto.... and i dont think you should really have that animation in your sig as well.. the mods might remove it for you.

i certainly don't like it, personally i hate damn drugs


Well I'll leave it up to them... I cant really see it offending anyone tho, its just a bit of fun, I also wouldnt really class that as a drug :D
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