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Tennis ball gun

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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Tennis ball gun

Unread postAuthor: roughboy » Mon Nov 13, 2006 1:07 am

Can someone tell me how to build a MINI tennis ball gun? it can either use a ball valve or a sprinkler valve

What i know is the barrel is 2.5'' coz that's the exact size of a tennis ball.
I have a shrader valve,pressure gauge,and a compressore.

So can someone tell me what other fittings i have to buy besides the 2.5'' barrel?



THANK YOU!!!
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Unread postAuthor: killagorrila99 » Mon Nov 13, 2006 1:14 am

Umm:
3 inch, 12 inch long pvc sch 40.
3 inch sch. 40 cap
3 inch to 2 inch reducer
2 inch to 1 inch reducer
1 inch to male threaded adapter
modded or unmodded sprinkler valve
1 inch to 2 inch reducer
2 inch to 2.5 inch adapter

Build it like an inline and the three inch is the chamber.
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Unread postAuthor: BC Pneumatics » Mon Nov 13, 2006 2:02 am

Most the items you need, valve, fittings for the barrel, etc, can be found on http://www.bcarms.com
If you need some more specific help, feal free to ask. What size do you need?
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Unread postAuthor: roughboy » Tue Nov 14, 2006 2:19 am

killagorrila99 does the ADAPTERS and the REDUCERS have to also be pvc sch. 40 or not?



Also the chamber, you said to use (3'', 12'' long pvc sch. 40.) my question is what amount of pressure should i use in this chamber? --thanx--
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Unread postAuthor: An Apple Pie » Tue Nov 14, 2006 5:48 pm

Yes all parts need to be Sch. 40. If you really wanted to you could use Sch. 80 but there is no reason to do this in a typical launcher. But yes all parts need to be at least Sch. 40 and Pressure rated(make sure the fittings say NSF-PW and not NSF-DWV) I would not pressurize it over 125PSI because of the valve.
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Unread postAuthor: roughboy » Sat Dec 09, 2006 12:21 am

what size of sprinkler valve should i use?
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Unread postAuthor: killagorrila99 » Sat Dec 09, 2006 1:05 am

Make a piston valve if possible. Other than that buy a 2 inch valve off ebay.
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Unread postAuthor: singularity » Sat Dec 09, 2006 1:23 am

well as a simple fact in most cases the bigger valve = better flow = more preformance, of course the speed the valve opens is a big factor but if we were just talking about one specific type of valve its always bigger is better
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Unread postAuthor: roughboy » Wed Dec 13, 2006 12:02 am

damn! I went to Ace hardware and the only sprinkler valve size they have is 1'' so i bought it. So can someone tell me what size of fittings do i need to change coz killagorrila99 said to use 2'' but i only found then bought a 1'' sprinkler valve.


thank you! :?
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Unread postAuthor: frankrede » Wed Dec 13, 2006 12:51 am

Ok, seriously, what fitting would you need?Just take a second and think about it. ANd how would you build a mini tennis ball launcher?
Last time I checked 2.5" is pretty big.
Sorry I'm a bit mad right now, I just got suspended from school.
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