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Sawed-off III, progress pics.

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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Sawed-off III, progress pics.

Unread postAuthor: Brian the brain » Sat Aug 22, 2009 4:34 am

Off to summervacation in an hour.
I just had time to share this with you..


Cannon name: Lupara ( Sawed-off III)
Cannon type: Single shot Pneumatic Sawed-off
Pressure used: Up to 50 bar
Valve: Modified QEV, now chambersealing!! High flow...
Caliber: 16 mm smoothbore ( perfect marble fit)
Stock/handles: Hardwood

The handle used to be bike handlebars, tapped to 1/2".
Ballvalve needs to be replaced, it leaks.
All hardwood still needs sanding, lacquer etc...

I lathed out the exit port on the QEV from the inside, leaving just a small ridge, to make room for the Nylon piston, and create higher flow than the original setup.

This also gave me the opportunity to get the 3/4" chamber and the barrel as close together as possible.
Piston has a 1 way rubber flap-for sensitive pilotting.
No idea about the performance but experience tells me at 50 bar it will be adequate...
I'll try to get the look up to Shatterhand level later, maybe add a triggerguard, that sort of stuff...

No time for testing...I'll be back in two weeks..
And off to European Pumkin Chunkin the next day.. :D



Some early pics:
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Attachments
Foto's-0001.jpg
Watch out...my 6 year old son is now armed...and feeted..(????)
Foto's-0003.jpg
Stacked hardwood rings around the steel bend..glued together...
Foto's-0002.jpg
Just an early impression..the barrel is accessable from the rear, I will thread a longer plug ( 1.5" long) for it to replace the standard plug.This will fill in the top some more for looks and give me better grip to unthread it as I breechload.
Last edited by Brian the brain on Sat Aug 22, 2009 4:45 am, edited 1 time in total.
Gun Freak wrote:
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: qwerty » Sat Aug 22, 2009 4:42 am

Sweet, *looks very powerfull and loud. I realy like the grips.




*classic BTB :)
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Unread postAuthor: CpTn_lAw » Sat Aug 22, 2009 6:18 am

50 bars???? WTF! What about recoil with a marble!?

I'm surprised a QEV could hold that pressure! gotta get my hands on one of these...
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Unread postAuthor: MrCrowley » Sat Aug 22, 2009 7:29 am

Damn at 50BAR that thing will be insane cant wait to see it finished :)

damn pui
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Last edited by MrCrowley on Sat Aug 22, 2009 3:47 pm, edited 1 time in total.
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Unread postAuthor: far_cry » Sat Aug 22, 2009 9:43 am

every time you amazed us again
that one lovely of work. 50 bars plus larg ammo such a 16 marble plus larg chamber and pig(not big) qev

i think this thing will demolish walls
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Unread postAuthor: inonickname » Sat Aug 22, 2009 9:50 am

I should build something like this with my QEV now I'm building (basically finished) the Co-ax..

Needless to say, bloody awesome.
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Unread postAuthor: maverik94 » Sat Aug 22, 2009 10:41 am

Don't let youre six year old go to school with that. :D :D :D
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Unread postAuthor: mark.f » Sat Aug 22, 2009 11:19 am

Nice woodworking around the rear handle, but that forearm deserves some checkering, and it all deserves some stain and polyurethane. :D
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Unread postAuthor: psycix » Sat Aug 22, 2009 12:19 pm

Sweet. It looks very short and compact.
Replace that ballvalve asap, a leak on the pilot side is dangerous.

Instead of unthreading the plug for breechloading, why not implement some sort of T-bolt? (pump action?)


Pumpkin chunkin yeah, I guess I'll see you in two weeks :)
Any other dutch/belgian guys want to come?
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Unread postAuthor: THUNDERLORD » Sat Aug 22, 2009 4:47 pm

psycix wrote:....Pumpkin chunkin yeah, I guess I'll see you in two weeks :)
Any other dutch/belgian guys want to come?


Probably just run into moar spudders who "coincedentally" had seen more of BTB's awesome stuff on youtube.( :P )

As usual, great to see another BTB creation.
OH, I recomend sanding a thumb spot on the grip, like a target grip maybe(?). 8)
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Unread postAuthor: twizi » Sun Aug 23, 2009 5:58 pm

wow u should make a ho w to on the qev u would make history in spudding or have u already? this is my faverite cannon or should i say shot gun.
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Unread postAuthor: YEAHADD16 » Mon Aug 24, 2009 9:54 am

Pretty Slick

Where did you get the QEV?

Have you thought of putting some sort of bolt on the breech of the barrel and loading it with premade shells? Just an idea that I tink will make it look INSANE
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Unread postAuthor: Brian the brain » Wed Sep 02, 2009 11:00 am

Woops..back earlier than expected...got tired of walking 200 meters to the bathroom in the freaking cold at night...bloody tents...

Well...The ballvalve will be replaced.
Offcourse I have considered all kinds of breechloading type solutions..I just haven't decided yet...

If I knew how to get good checkering on a grip I would have done it on " Old Shat.."
:shock: :wink:
I got the QEV at BTB:D

wow u should make a ho w to on the qev u would make history in spudding or have u already? this is my faverite cannon or should i say shot gun.


I guess I have already.. :)

I intended to enter this in the competition..
But this valve was the only innovating thing I had left after someone beat me to the onboard benjamin pump.
That was supposed to be combined with this valve, but I couldn't get it to fill from the chamber side...
It would have made a very clean gun..
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Last edited by Brian the brain on Tue Jan 29, 2013 1:38 pm, edited 1 time in total.
Gun Freak wrote:
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: Brian the brain » Thu Sep 03, 2009 9:01 am

More pictures..Next thing is wrapping the ballvalve itself in wood, so the handle seems to be connected to the QEV.
This will be quite a task...like making jigsaw puzzles.... in 3D..
:wink:
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Attachments
Luparawood 004.JPG
Luparawood 003.JPG
Luparawood 002.JPG
Luparawood 001.JPG
Gun Freak wrote:
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: JDP12 » Thu Sep 03, 2009 9:16 am

HOLY CRAP

Brian that is amazing! 2 of the best gun's I've ever seen on this site bar none
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