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Schweizer-Valve Orange Accelerator

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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Schweizer-Valve Orange Accelerator

Unread postAuthor: dongfang » Fri Apr 25, 2008 3:21 pm

Hi,

Finally I got around to make a gun out of a valve that I had sitting around for a long time. It´s the larger one of the tees in my avatar.

The set-up is a rather conventional 3000 cc barrel sealer, except:

- The main seal is not on the front of the piston, but rather on its seat. It´s an O-ring, about 60 mm inner dia, jammed into a groove. The piston is a 63 mm ID end cap, and the tee is 75 mm ID.

- The pilot valve is a DFTV. In fact, it´s my SEX Pistol now returned to pilot valve service.

The barrel is a 75 mm OD PP drain pipe. I am NOT afraid it will explode; that plastic is really tough, much better than PVC. Only problem is, it is nearly impossible to cement.

I have only fired the gun once since I built it (and it had been lying around for a long time before that - I am concentrating on a different project right now). It sent an orange about 50 m in a neat and straight line, before it splattered on a tree in a large cloud of vaporized orange juice ;) ;) ;) And that was at only 5 bar - I was afraid of too much recoil at higher pressures.

As for higher pressures, the weakest part, the chamber pipe, is rated for 10 bar. Everything else has a 16 bar rating. My supplier only gets 16 bar pipe when he can´t get 10 bar - but then he sells it at the 10 bar price :lol:

In a few days, I will take it to 10 bar, with my friend taking a video... I got the oranges today, hehe. Stay tuned.

Regards
Soren
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Attachments
DSC_0252.JPG
Me with the gun
DSC_0229.JPG
Breech end
DSC_0217.JPG
The Orange Accelerator, sitting on my tripod
DSC_0204.JPG
The breech with its O-ring seal, O-ring bumper (until I get some neoprene), 12 bolt holes and DFTV pilot valve.
DSC_0195.JPG
A look at the valve seat. The porting is very large for the tee size.. but it still opens faster than fast enough.
DSC_0191.JPG
The valve components.
aaben2.JPG
Old propaganda picture, from before I attached the chamber. The chamber is only epoxied on, so with a little care, a saw and a chisel, it can be replaced.
Last edited by dongfang on Fri Apr 25, 2008 3:50 pm, edited 2 times in total.
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Unread postAuthor: jrrdw » Fri Apr 25, 2008 3:27 pm

AWESOME! Need I say more.
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Unread postAuthor: POLAND_SPUD » Fri Apr 25, 2008 3:54 pm

hmmm.. looks great I really like the way u used that o-ring
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Unread postAuthor: SpudFarm » Fri Apr 25, 2008 4:04 pm

Larda has used an O-ring like that..
but that gun is just to awesome!!

vids please
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Unread postAuthor: STHORNE » Fri Apr 25, 2008 4:06 pm

wow dude, nice work...its so beefy!

thinkin bout a paint job? so it could literally be the "Orange" Accelerator...
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Unread postAuthor: MaxuS the 2nd » Fri Apr 25, 2008 4:36 pm

Wow, that is one fit biatch..




I suppose the gun's awesome too. :D
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Unread postAuthor: unisonmind » Fri Apr 25, 2008 5:05 pm

OMG that is a nice cannon, its so clean :shock:
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Unread postAuthor: e1337 » Fri Apr 25, 2008 10:46 pm

Beautiful, and the name is amazing.
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Unread postAuthor: Lentamentalisk » Sat Apr 26, 2008 12:29 am

I highly suggest some sort of barrel support, as you dont want to stress your valve too much, and it would make it look cooler.
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Re: Schweizer-Valve Orange Accelerator

Unread postAuthor: THUNDERLORD » Sat Apr 26, 2008 12:45 am

dongfang wrote:
- The main seal is not on the front of the piston, but rather on its seat. It´s an O-ring, about 60 mm inner dia, jammed into a groove.


Sounds like a good idea. Thanks for the photos of the internals.
It looks like a lot of fun.
Looks Big for handheld cannon,I like the picture where you're holding it. 8)
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Unread postAuthor: hyldgaard » Sat Apr 26, 2008 2:44 am

Looking very good :) nice work on the large porting for that size tee. When you fire it, do you use the pilot valve as a shoulder support? or du you fire it from the hip? i would imagine that the recoil at higher pressure than 5 bar combined with an orange could do some damage to that pvc if it was to be shouldered :?
On a sidenote, how did your pump turn out?
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Unread postAuthor: Brian the brain » Sat Apr 26, 2008 6:16 am

wow! Very nice build.
My brother and me built something similar (and blew it up later using ice ammo)

This is all ours could have been if my brother had not been so stubborn.
Love how you built your own exhaust valve and I love the overall cleanness of it.
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Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: starman » Sat Apr 26, 2008 6:46 am

Solid looking and well constructed gun there. The tape holding the the trigger valve is a little low-end for an otherwise nice presentation.

I also like the O-ring seat very much. Simple but innovative. Nice job!
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Unread postAuthor: jackssmirkingrevenge » Sat Apr 26, 2008 8:40 am

Given the specs it should be fearsome at 10 bar, can't wait to see it in action :)
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Unread postAuthor: bigbob12345 » Sat Apr 26, 2008 8:44 am

Very nice job
Looks really poweful, looking foward to vid
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