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2.5" barrel for tennis balls

A place to ask general spud cannon related questions.
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Unread postAuthor: cb4289 » Sun May 13, 2007 3:17 am

cut a big long slit at least 2'' down one side of the tennis ball and fill it with airsoft pellets or buckshot which ever works. fill it and tape it up with scotch or masking or another weak tape. oh and will a beer can fit in to a 2.5'' barrel. ??? :idea:
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Unread postAuthor: Bubba05 » Sun May 13, 2007 10:48 am

Yeah that would work well! You could also use lead shot sinkes they act as pritty good shot for a home made shot gun!

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Unread postAuthor: Rayman_1337 » Sun May 13, 2007 10:52 am

Im using a 2 foot 4 inch chamber, and 3 foot 2.5 inch barrel....what would extending the chamber do?
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Unread postAuthor: Bubba05 » Sun May 13, 2007 10:56 am

You need a smaller chamber! the smaller it is the more copression the better the force. Simple suck squezse bang blow.
try like a 1.5 ltr chamber and they dont take to much to fill like a 2 second squirt fom an arosole can. You still didnt tell me what your using for fuel?

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Unread postAuthor: Rayman_1337 » Sun May 13, 2007 11:10 am

o sorry, its a pneumatic so im using a bicycle pump....I got the thing up to 40 psi, the tennis ball only went like 15 feet =[
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Unread postAuthor: Bubba05 » Sun May 13, 2007 11:16 am

yeah u need a smaller chamber or you need more pressuse!
I have a combustion tennis ball launcher and I can get a good 500 meters with mine :) Plus I love the BANG!
Im to much of a neaderthall when it comes to these wiz bang pnematic thingys!

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Unread postAuthor: frankrede » Sun May 13, 2007 12:21 pm

Bubba? who hell do you think you telling people false information!
On that setup a smaller chamber would give him power but not that efficient, he should keep the chamber the same size and get a longer barrel for more power.

And bubba by your methods of thinking a mini should shoot a mile and my overunder should barely tear through cardboard.


on a pneumatic, a smaller chamber is bad, unless you hate pumping.


Rayman what valve are you using?
And I suggest you make your barrel longer.
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Unread postAuthor: cb4289 » Sun May 13, 2007 12:56 pm

hay comrades does beer cans fit inside 2.5'' barrels
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Unread postAuthor: Rayman_1337 » Sun May 13, 2007 12:56 pm

Im using a orbit watermaster sprinkler valve but it is leaking, I was told it might need to equalize, but I put a ball valve infront of it, and in back of it, all it did was make a loud farting noise as the air rished through the diaphram....
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Unread postAuthor: frankrede » Sun May 13, 2007 1:02 pm

I would put it behind it.
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Unread postAuthor: Rayman_1337 » Sun May 13, 2007 1:03 pm

yea I did, didnt work tho....just leaks.
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Unread postAuthor: frankrede » Sun May 13, 2007 1:36 pm

did you close the valve and then pump?
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Unread postAuthor: Rayman_1337 » Sun May 13, 2007 1:44 pm

yes I did, and when it was at about 40 psi I opened the valve, it just rushed through the sprinkler valve
im thinking of goin to the hardware store today and starting from scratch and just making this http://www.spudfiles.com/forums/joels-t ... t1965.html
simple enough
I just hope the next sprinkler valve I get works...
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Unread postAuthor: Flying_Salt » Sun May 13, 2007 2:42 pm

cb4289 wrote:hay comrades does beer cans fit inside 2.5'' barrels


I'm pretty sure they do. A while ago, I think in the video link thread, there was a video of a bunch of things filmed be a high speed camera being shot with beer cans. That was a fun video. I'll see if I can find it.
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Unread postAuthor: Rayman_1337 » Sun May 13, 2007 4:47 pm

please do I want to see that.
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