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Pellet Gun V2

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: chinnerz » Wed Apr 07, 2010 1:40 am

XRV?

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an idea for the trigger system, however you will need to pull it quickly.... or use a hammer
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Unread postAuthor: qwerty » Wed Apr 07, 2010 2:39 am

Chamber is abit overkill and to make it more astheticly pleasing you could make the smaller chamber into a handle/grip. Another thing, the power wouldn't be very good because of the short barrel and slow opening times of the valve so it would benifit(SP?) from higher pressures.

Oops sorry i thought it was a single thread and didn't see the page before :roll:
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Unread postAuthor: Hawkeye » Wed Apr 07, 2010 10:57 am

I would put a "hammer" around the barrel that slides forward against a spring and when triggered slides backwards and strikes a collar on the barrel. Very much like a Condor style hammer but without the complexity of a breech.
You would need to build a bit more structure around the barrel to support this type of mechanism though.
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Unread postAuthor: clemsonguy1125 » Wed Apr 07, 2010 11:24 am

I was thinking something like this, its not to scale or any thing
XRV-Explosive Release Valve
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Unread postAuthor: john bunsenburner » Wed Apr 07, 2010 11:41 am

I've tried doing that once, i never made a working model because i realized other valves are better suited for larger bores, nonetheless, if you wish to have a look at my attempts, feel free.
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Unread postAuthor: Mr.Sandman » Wed Apr 07, 2010 11:43 am

Technically a XRV is nothing more than a manual hammer valve. The rubberband idea seems doable and should increase performance. However you would have to get a really strong rubberband for most pressures.
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Unread postAuthor: clemsonguy1125 » Wed Apr 07, 2010 11:46 am

Ive tried a larger boar but it was almost impossible to fire at 30 psi so I scaled it down to this, I havent power tested V2 but it seems to be slightly more powerful than V1 which could shoot through 4 or 5 cans at 80 psi which is the limit of my pump, I need to order a shocky, then I can really see the power of this thing
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Unread postAuthor: Mr.Sandman » Wed Apr 07, 2010 11:50 am

clemsonguy1125 wrote:Ive tried a larger boar but it was almost impossible to fire at 30 psi so I scaled it down to this, I havent power tested V2 but it seems to be slightly more powerful than V1 which could shoot through 4 or 5 cans at 80 psi which is the limit of my pump, I need to order a shocky, then I can really see the power of this thing
Well that sounds kind of contradictory . At higher pressres i imagine this thing will be very difficult to fire.
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Unread postAuthor: clemsonguy1125 » Wed Apr 07, 2010 11:55 am

Well it was impossible to fire with a 1/2 in boar but this is a 1/4 and is still easy to fire at 80 so at 150 it should still be possible to fire and at 200 to 250 with a spring loaded trigger mechinism it should be able to
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Unread postAuthor: Mr.Sandman » Wed Apr 07, 2010 12:01 pm

clemsonguy1125 wrote:Well it was impossible to fire with a 1/2 in boar but this is a 1/4 and is still easy to fire at 80 so at 150 it should still be possible to fire and at 200 to 250 with a spring loaded trigger mechinism it should be able to
Like i said earlier, you will need a very strong spring and it seems like it will be more trouble than it is worth. Even with the strong spring, you will have to recock it and what not. So that being the case why not add a handle to the barrel for more leverage?
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Unread postAuthor: clemsonguy1125 » Wed Apr 07, 2010 12:09 pm

actually i just took apart my broken airsoft pistol and I may add that as the handle, what do you think would be the best way to attach it, Its metal so super glue wont work
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Unread postAuthor: Mr.Sandman » Wed Apr 07, 2010 12:20 pm

clemsonguy1125 wrote:actually i just took apart my broken airsoft pistol and I may add that as the handle, what do you think would be the best way to attach it, Its metal so super glue wont work
EPOXY would be the most viable option.Of course you could use bondo or some sort of epoxy putty.
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Unread postAuthor: clemsonguy1125 » Wed Apr 07, 2010 12:27 pm

I havent had the best luck gluing metal with epoxy but tis probably because i mixed it wrong, ill try it if I get a chance to cut a groove in the pipe
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Unread postAuthor: Mr.Sandman » Wed Apr 07, 2010 12:48 pm

clemsonguy1125 wrote:I havent had the best luck gluing metal with epoxy but tis probably because i mixed it wrong, ill try it if I get a chance to cut a groove in the pipe
Well are you gluing the entire lower reciever of the pistol to the barrel? If so then use bondo and basically cake it on there and smooth it out. Then when it is dry sand it and paint away.
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Unread postAuthor: clemsonguy1125 » Wed Apr 07, 2010 1:12 pm

I figure i will glue the barrel in the barrel part of the shell and cut off the hammer with a dremal

Edit-Airsoft grip didnt work so I used pvc
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