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Rayovac Rifle

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Unread postAuthor: the cats in the bag » Thu May 29, 2008 8:18 pm

Nice gun, what did you use to screw on the barrel to the valve?

metal dose look nicer but pvc is dirt cheap, or at least it is were i live.
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Unread postAuthor: JDP12 » Thu May 29, 2008 8:19 pm

they probably do.

STHORNE- about my compressor- i just chopped it off my buddies fridge today.

here's whats gone down so far-

1) Ripped it off, releasing a lot of freon in the process. (Bought a kickass pair of oakley's as well from his dad)

2) as i was driving home, it tipped over and all this yellowish liquid spilled out... oops... cleaned it up though.

3) Inspected it... WTF... it has 3 output or whatever things... i'll have to figure out what does what when i hook it up.

TO do with it:

1) Wire it up with a plug and a switch
2) figure out what pipe does what
3) Add an air filter to air input
4) get some sort of reservoir- any ideas?- i know a volunteer firefighter- i'll talk to him possibly
5) add the output from the reservoir- screw a regulator- i'm runnin it straightup at whatever PSI.
6) add some sort of popoff valve possibly?? for safety? Any ideas-
6) find high pressure hosing- any ideas on that?

thanks all.. please comment on the asking for ideas if you dont mind.

i plan on mounting it all to some sort of board so that it looks really neat... similar to this- http://www.spudfiles.com/forums/files/c3_213.jpg
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Unread postAuthor: DYI » Thu May 29, 2008 8:24 pm

For a resevoir, just go to a welder's shop, find an old piece of ridiculously sized steel pipe lying around rusting and waiting for a new home, and get them to weld plates on both ends of it, and then tap in whatever holes and fittings you need.

As for hoses... Why don't you just use hydraulic hose? Easily available, and the 1/4" stuff is basically 1/2" braided SS cable with a little rubber coated hole down the middle, and pressure rating of 5800psi. You could buy dedicated air hose and fittings from McMaster for that pressure, and it would probably eliminate the leaking problems caused by using hydraulic stuff with gases.[/quote]
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Unread postAuthor: JDP12 » Thu May 29, 2008 8:30 pm

mm ok good idea DYI, thanks...

i found some hose on MCMASTER, but what does bend radius mean? If it says 2.5", is it a stiffness?? is that (2.5") fairly stiff or flexible?
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Unread postAuthor: DYI » Thu May 29, 2008 8:42 pm

That number means that the smallest circle you can bend it into without compromising its strength has a radius of 2.5" (diameter of 5").
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Unread postAuthor: JDP12 » Thu May 29, 2008 8:43 pm

oh cool thanks, i found some cheaper stuff that goes up to 400 PSI... im going to use that cuz its cheaper, thanks DYI.
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Unread postAuthor: STHORNE » Fri May 30, 2008 4:19 pm

the cats in the bag wrote:Nice gun, what did you use to screw on the barrel to the valve?


Well, the barrel OD and the (rusted) 3/4" fitting's ID were almost the same, making for a good fit. Held together by friction and electrical tape. Then behind that is a screw to act as a stopper. Then the 3/4" PVC fitting to be able to make the barrel interchangeable.

@ilovetoblowthingsup
Very nice work with the fridge compressor. Sounds like you just need to clean her up a bit and modify it a little and it should be good to go!
And nice find with the hose :wink:
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Unread postAuthor: Lentamentalisk » Fri May 30, 2008 4:40 pm

there are 3 ports on your fridge compressor because on of them is a freon-in, one is a freon-out, and one is where they originally put the freon in from, and then it should be crimped off and welded up. Do not mess with the crimped up port, leave it as it is. The bigger port is where it will suck the air in from, and the smaller one is where it will blow it out of.
Hope this helped
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Unread postAuthor: POLAND_SPUD » Fri May 30, 2008 5:06 pm

@lentamentalisk the way I understand it he meant that his compressor has some additional ports not just the 3 standard ones... (ohh well check it http://www.spudfiles.com/forums/gaaaaah ... 14669.html)

storne lol I never fire anything at greater angle than 70 - 80 degrees so that I know where it would land and I ussually step back 10 meters just to be sure... how come you could have seen it ?
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Last edited by POLAND_SPUD on Sat May 31, 2008 4:04 am, edited 1 time in total.
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Unread postAuthor: STHORNE » Fri May 30, 2008 6:52 pm

what do you mean, "how come you could have seen it?". I don't quite exactly follow what your asking... :?
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Unread postAuthor: Maniac » Fri May 30, 2008 9:05 pm

Hey, I kinda liked the older version more than the new, but whatever suits you. Those copper canisters at my lowes are fairly cheap, but there they call them high pressure air chambers (atleast that is what the label says).

I think what poland spud is trying to say is how do you see your ammo way up in the sky. Thats why he never fires straight up so it doesnt land on him.(there was an experiment on mythbusters though where they tested bullets being shot up in the air and them coming down and landing on people killing them probably wasnt true, they lost all of there velocity, but theres always a chance, it also is different in a spud gun.)
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Unread postAuthor: POLAND_SPUD » Sat May 31, 2008 3:59 am

@maniac yeah that's what I meant... I see batteries only for spilt second after they leave the barrel and that's it.. I don't even see them falling down the only thing I see is a small 'mushroom' of dust where they hit the ground... (lol why they never theach people how to express something like that in english?)

anyway I don't think that what you did was safe - AA batteries are quite heavy... maybe I am not an expert in terminal ballistics but even if they tumble while falling down I suppose that they have more than enough energy to wound and possibly kill
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Unread postAuthor: BlackH » Thu Jun 05, 2008 5:04 am

that hit on the thomb must have been %#%#$#!!!!!!!!!
Nice gun love it small and compact
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Breaking stuff with a Big Bang haven’t been this much fun!!!!!!!!!!


http://www.spudfiles.com/forums/bh-2400 ... 14078.html
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Unread postAuthor: Spuddin » Thu Jun 05, 2008 2:40 pm

sweet rifle, g/j. but 1 question, why not turn the valve around so the bulky part is down, you would have a flat top, might be easier to aim?
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Unread postAuthor: neeewwww » Mon Jun 09, 2008 1:31 pm

1/2" Chamber fits an AA Battery?
Wikipedia says:
An AA battery measures 51 mm in length (50.1 mm without the button terminal), 13.5–14.5 mm in diameter,[1] (1.97×0.56 inches). Traditional alkaline AA batteries weigh roughly 23 g (0.81 ounces), Lithium AA batteries weigh around 15 g (0.5 oz), and rechargeable NiMH batteries weigh about 31 g (1.1 oz).
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