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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: Jack_Hogg » Tue Nov 03, 2009 12:25 pm

Well, as I promised.. I made pictures of my rear sight today. And I took some pictures of the piston closed and opened.

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Unread postAuthor: jackssmirkingrevenge » Tue Nov 03, 2009 10:39 pm

Again, beautiful.

If I could make an aesthetic suggestion, paint the steel parts black, polish the brass and copper and add some kind of wooden grip to cover the handle-
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Unread postAuthor: rikukiakuchiki777 » Wed Nov 04, 2009 1:33 am

Brian the brain wrote:Psy...you better get that machined piston valve you have been talking about..this clearly outdoes a regular QEV..


In what ways does this valve outperform a QEV? I would have thought a commercial QEV would perform better because it has been professionally designed, etc. I'm just asking because I'm still waiting for my QEV to arrive so I haven't yet used one, nor do I own a launcher like this so I can't compare the two.
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Unread postAuthor: psycix » Wed Nov 04, 2009 5:54 am

Commercial QEV's have a smaller porting. A 1/2" QEV has about 14-15 mm porting, yet I am using one for my 16 mm barrel.
Thus a homemade piston valve can have more flow. Not that a 1/2" QEV sucks, it is a very powerful valve, but a well made piston valve can outperform them. Especially with high muzzle velocities (a lot of flow required).
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Unread postAuthor: Jack_Hogg » Wed Nov 04, 2009 9:10 am

I have machined a 18mm porting for a 25mm (ID) barrel. That's the biggest porting possible for a ¾" Tee. The most I could get for this design.
jackssmirkingrevenge wrote:Again, beautiful.

If I could make an aesthetic suggestion, paint the steel parts black, polish the brass and copper and add some kind of wooden grip to cover the handle-


That's the look of the BTB sawed-off Mark3. I do like that look, but polishing brass and copper, will turn dull again after touching it. Also, I do like the brutal steel look for this design more. It looks and feels a bit more powerful. Just my personal taste... :roll: Well I am going to buy some thick heavy duty shrinking tube for the pistol grip and the resevoir.
About the paint, I will only paint the rear, and the front sight.
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Unread postAuthor: Brian the brain » Wed Nov 04, 2009 5:44 pm

Wow krimpkous...goede keus, andere stijl.

If you want a brutal look...you should saw off the barrel about 3 mm SHORTER than the reservoir.
At least..that's my trademark....
It looks very rugged.

Everything else is very.." me" ..you even understood the reason for the double T design..so you might get what I mean.
" Brutal " is the essence of what I was after the first time I built one.

Although I love the sights...a true sawed-off shouldn't have any.
Not that I could resist those beauties myself!

exellent work.
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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: Mr.Sandman » Wed Nov 04, 2009 7:03 pm

What he said. Anyways i like the rugged look it reminds me of a certain members high pressure sawn off...lol. Also might i suggest a shotgun load of 4.5 mm bbs? If some 6mm bbs can do that amount of damage imagine what smaller harder bbs would do :D One more thing, I would imagine that this beast is loud and has a bit of recoil. Have you thought about a muzzle brake or a silencer? Because not only would it please her but it would look like the big bad wolf on steroids!
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Unread postAuthor: Jack_Hogg » Thu Nov 05, 2009 2:27 am

Brian the brain wrote:If you want a brutal look...you should saw off the barrel about 3 mm SHORTER than the reservoir.
At least..that's my trademark....

Thanks BTB :) I didn't sawed off the barrel that much, becouse it would lost a lot of power. I have chosen for the looks of a compact and powerful design.

Mr.Sandman wrote:Have you thought about a muzzle brake or a silencer?

No. Becouse I like the loud bang :twisted: Another reason is, the silencer or muzzle brake will make the gun longer. That are the main reasons I don't want to have that on my gun. Thanks though :roll:
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Unread postAuthor: jackssmirkingrevenge » Thu Nov 05, 2009 5:35 am

Jack_Hogg wrote:I didn't saw off the barrel that much, because it would lost a lot of power. I have chosen for the looks of a compact and powerful design


The coaxial I made (currently curing, will test it this afternoon at low pressure and if eveything works tomorrow at 800 psi) has a 2 foot barrel, much as I love the sawn off look I couldn't abide by the power loss and inefficiency, not to mention noise. Who knows, if it (works!) has power to spare, I might chop it down a bit, and have an underbarrel cylinder as a suppressor to go with the pump action look :)
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Unread postAuthor: cannonmaster » Sat Nov 07, 2009 4:36 pm

All in all a good gun but i see some flaw's like about the t Joint you say it is just for decoration. I think that if a gun working and functional than it is beautiful even though it works i would recommend not altering it for decoration unless nessary like if you wanted a handle and you put the t-joint there for that pourpous than it is good But for a first gun it is exceptional.
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Unread postAuthor: Brian the brain » Sat Nov 07, 2009 5:52 pm

Decoration is one thing..style is another.
Can't wait for the flat black paintjob.

And JSR...

Hurry up!
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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: Marffy » Sun Nov 08, 2009 12:14 am

so whats the piston made out of?
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Unread postAuthor: tghhs » Sun Nov 08, 2009 1:30 am

Marffy wrote:so whats the piston made out of?
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Unread postAuthor: qwerty » Sun Nov 08, 2009 3:15 am

Good work tghhs, already showing up the "noobs" :wink:
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Unread postAuthor: Jack_Hogg » Sun Nov 08, 2009 4:49 am

Going to make the new nylon piston tomorrow, pictures will come soon :wink:
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