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.50" QEV gun *New stock, almost finished*

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: jakethebeast » Fri Jul 23, 2010 6:02 pm

thanx jsr, that was just "freshing memory" :D

yeh the stock is very nice, but you should put moar pressure to get MOAR POWAHH
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Unread postAuthor: Ragnarok » Fri Jul 23, 2010 7:11 pm

spudtyrrant wrote:
c11man wrote:ive been to 45, who takes theres to 60?
jeepkahn in the decimator, and maggotman(not the best example lol)

al-xg was one of the first (maybe even the very first) to do so, I believe.
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Unread postAuthor: maverik94 » Fri Jul 23, 2010 8:20 pm

It looks pretty nice. The stock looks kinda small, but whatever works for you! I like it!
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Unread postAuthor: zy » Fri Jul 23, 2010 10:23 pm

maverik94 wrote:It looks pretty nice. The stock looks kinda small, but whatever works for you! I like it!


Yeah, the proportions looks a little of, probably because of the total length, it is kind of a long gun. Thx anyway :)
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Unread postAuthor: POLAND_SPUD » Sat Jul 24, 2010 2:43 am

jakethebeast wrote:
if i had a barrel sealing piston valve with spring behind the piston, would it be semi-automatic if i pilot it with small qev?


yes

Quote:
if so, do the small qev need to have a spring?


no

Nope that's wrong... if you fill it from the chamebr side then you can achieve semi-automatic fire with a blowgun (or a similar valve)...

Unfortunately, a small QEV won't work becasue the piston acts as a check valve and it will open as soon as pressure is present on the pilot side of the main piston valve.

If you want to fill it from the pilot side then you need a DCV valve (a.k.a. a 3way valve). That's the best way to achieve semi-automatic fire with a QEV
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Unread postAuthor: jackssmirkingrevenge » Sat Jul 24, 2010 3:38 am

POLAND_SPUD wrote:Unfortunately, a small QEV won't work becasue the piston acts as a check valve and it will open as soon as pressure is present on the pilot side of the main piston valve.


Hadn't Brian succesfully modded a QEV with the simple expedient of a pin-prick equilisation hole?
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Unread postAuthor: POLAND_SPUD » Sat Jul 24, 2010 4:09 am

yeah but a small QEV would need an equalisation hole and a spring too
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Unread postAuthor: spudtyrrant » Sat Jul 24, 2010 9:22 am

Ragnarok wrote:
spudtyrrant wrote:
c11man wrote:ive been to 45, who takes theres to 60?
jeepkahn in the decimator, and maggotman(not the best example lol)

al-xg was one of the first (maybe even the very first) to do so, I believe.
he also tore the piston lol
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Unread postAuthor: zy » Sat Jul 24, 2010 11:51 am

Working on a new stock :)
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Unread postAuthor: blind909 » Sat Jul 24, 2010 5:01 pm

That stock reminds me of the Steyr AUG- http://www.militaryfactory.com/smallarm ... yr_aug.jpg DAMNIT! cant remember how to make it so that when you click on the word it brings up the link, help please?
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Unread postAuthor: spudtyrrant » Sat Jul 24, 2010 5:06 pm

blind909 wrote:That stock reminds me of the Steyr AUG- http://www.militaryfactory.com/smallarm ... yr_aug.jpg DAMNIT! cant remember how to make it so that when you click on the word it brings up the link, help please?
poor you :cry:
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Unread postAuthor: theBOOM » Sat Jul 31, 2010 9:54 am

Is that new stock finished??
Also, what are you using as a chamber??
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Unread postAuthor: zy » Sun Aug 01, 2010 11:48 am

theBOOM wrote:Is that new stock finished??
Also, what are you using as a chamber??


Almost finished. Did this stock in a hurry so the finish is not nearly
as good as the other one. Im painting it now, pics will come soon :) .

The chamber is made of 1-1/4" "metal-pipe-fittings" (dont know the correct terms in english :P ).
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Unread postAuthor: zy » Mon Aug 02, 2010 7:51 am

Swosh, the gun is quite powerful :o .

Testshot @ 4.5cm (1.77") wood.

Btw, any tip on a good (and maybe cheap?) .50 ammo? Tested .47" wooden balls, but that was a catastrophe... .50" airgun lead
pellets would be nice, but I can only find them in america = too high shipping costs to europa.
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4.5cm (1.77&quot;) wood

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Unread postAuthor: spudtyrrant » Mon Aug 02, 2010 8:20 am

zy wrote:Swosh, the gun is quite powerful :o .

Testshot @ 4.5cm (1.77") wood.

Btw, any tip on a good (and maybe cheap?) .50 ammo? Tested .47" wooden balls, but that was a catastrophe... .50" airgun lead
pellets would be nice, but I can only find them in america = too high shipping costs to europa.
you could always go with fishing sinkers :wink:
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