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valveless pellet gun

Built a miniature 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: jackssmirkingrevenge » Fri Jun 22, 2007 8:34 am

The barrel's hard brass and the pellet is soft lead, it would take hundreds of thousands of shots before any wear would be apparent.
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Unread postAuthor: goathunter » Fri Jun 22, 2007 9:16 am

Now this is going to be fun to try in a BBMG.I have one in the works right now.Might have to play around with the idea :wink: Thanks Jack
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Unread postAuthor: jackssmirkingrevenge » Fri Jun 22, 2007 9:49 am

I was going to try and make it for a BBMG but i realised that the same effect could be acheive much easier by having the BBs in the chamber and a ball valve between the chamber and the barrel :)
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Unread postAuthor: goathunter » Fri Jun 22, 2007 12:08 pm

Yeh, but something has to be said for doing it just because you can.I've got all summer so why not.
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Unread postAuthor: jackssmirkingrevenge » Fri Jun 22, 2007 12:20 pm

nothing wrong with that, good luck :)

On the other hand, I think it would be more interesting to apply this principle to a medium calibre launcher to give exceptional efficiency and performance, upgraded to say marble calibre...
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Unread postAuthor: Tom » Sun Sep 09, 2007 12:00 pm

Wow Jack your idea's are coming, it looks very simple to make. What kind of program do you use to make the diagrams or do you draw it?
GR.Tom
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Unread postAuthor: jackssmirkingrevenge » Sun Sep 09, 2007 12:02 pm

Tom wrote:Wow Jack your idea's are coming, it looks very simple to make. What kind of program do you use to make the diagrams or do you draw it?


In retrospect, I think a burst disc is a better idea as it gives you the opportunity to use any projectile you want even if it's not 100% airtight.

My diagrams are either drawn completely with MS paint or drawn with pen, scanned as line-art and coloured in with paint.
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Unread postAuthor: NewB » Sat Oct 13, 2007 8:22 pm

I have an idea for a bbmg.


Image

Brown- chamber, barrel, and blocker
red- spring
green- trigger and sliding rod
purple- pivot point
black- rubber o-ring
yellow- bbs
blue- compressed air

Just get a bigger chamber more bbs and hook it up to an air compressor

Sorry, I am no artist. :oops:
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Unread postAuthor: LikimysCrotchus5 » Sat Oct 13, 2007 8:29 pm

I dont think its a bad idea NewB. According to Jacks design, it should work very similarly.
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Unread postAuthor: jackssmirkingrevenge » Sun Oct 14, 2007 8:57 am

That's pretty much a combination of my concept sketches, if you can achieve a good seal then it would work. In practice it's easier to just put a ball valve between the barrel and the chamber.
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Unread postAuthor: NewB » Sun Oct 14, 2007 10:33 am

I think this would be easier to operate and quicker to open and close thus letting less bbs out.
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Unread postAuthor: jackssmirkingrevenge » Sun Oct 14, 2007 11:31 am

Sure, if you can handle the increased build complexity. I decided it wasn't worth the bother :roll: :)
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Unread postAuthor: SpudFarm » Sat Dec 08, 2007 1:41 pm

i have acctualy thought about that a wile ago but i was thinking about a pistion thats hold back by a bolt then realest and goes in a bigger part of the barrel stops in a bolt that is in the middle of the bigger part then the air goes past it. it is pretty hard to explain
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Unread postAuthor: jackssmirkingrevenge » Sun Dec 09, 2007 1:56 am

... and your linguistic skills clearly offer no assistance to the proceedings :roll: :D
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Unread postAuthor: Novacastrian » Sun Dec 09, 2007 2:56 am

spudfarm wrote: it is pretty hard to explain


Obviously :lol:

Increased complexity adds many a challenge, are you up for it my friend?
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