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.50" QEV gun *New stock, almost finished*
Posted: Fri Jul 23, 2010 9:44 am
by zy
Just dropping by to inspire fellow spudders with this newly built QEV gun.
Hope you will enjoy it.
Info
1/2" QEV.
Pilot valve: modified blowgun (original didn`t take pressure over ~10 bar, and too low airflow).
.50" barrel, 57cm long (22 inch).
Wooden stock with adjustable length.
Scope is a cheap 3~9X40 GD from Dealextreme.
Pump: fork-pump that can handle 450psi/31bar.
Operating pressure: I actually dont know myself because the manometer on the fork-pump is somewhat... bad. When my compressor shows 9 bar, this show about 5 bar
. But I take it too ~10 bar, so maybe 15 bar`ich?
It is probably calibrated to show accurate measurements @ 30 bar.
The gun is easily taken apart without tools for transportation etc.
Next project will be a semi-auto bullpup design with a 1/2" T-valve actuated by a electromagnet (coil + magnetic piston). But it will probably take a while to build, if I ever complete it... Well, that is another story.
Peace
Posted: Fri Jul 23, 2010 9:48 am
by jackssmirkingrevenge
Very nicely put together, in a quaint sort of way
must take a bit of effort to get it up to pressure though as the chamber seems relatively large, you would have been better off with a smaller chamber and higher pressure.
The stock is particularly well finished, what wood is it?
Posted: Fri Jul 23, 2010 9:48 am
by Lockednloaded
that stock is amazing, but the gun looks kind of dangly next to it. I recommend a wooden support
Posted: Fri Jul 23, 2010 9:51 am
by jackssmirkingrevenge
You might want to try sleeving the barrel as suggested
here, it would look less skinny plus you'd have the benefit of an integral silencer
Posted: Fri Jul 23, 2010 9:52 am
by zy
jackssmirkingrevenge wrote:Very nicely put together, in a quaint sort of way
must take a bit of effort to get it up to pressure though as the chamber seems relatively large, you would have been better off with a smaller chamber and higher pressure.
The stock is particularly well finished, what wood is it?
Aaa forget, the chamber is about 110cc. Yeah it take 200 pumps to ~15 bar (bad manometer...). The problem is that I am a coward, the QEV`s max pressure is 12 bar, and I have no idea how much punishment it can take... So I am on the safe side
.
Posted: Fri Jul 23, 2010 9:53 am
by zy
Lockednloaded wrote:that stock is amazing, but the gun looks kind of dangly next to it. I recommend a wooden support
It is actually very stable
Posted: Fri Jul 23, 2010 9:56 am
by zy
jackssmirkingrevenge wrote:You might want to try sleeving the barrel as suggested
here, it would look less skinny plus you'd have the benefit of an integral silencer
Hehe yeah, maybe I do, someday. But Im satisfied with the looks, or, I dont care so much for the looks. as long as it works, Im fine hehe.
Posted: Fri Jul 23, 2010 10:04 am
by spudtyrrant
zy wrote: The problem is that I am a coward, the QEV`s max pressure is 12 bar, and I have no idea how much punishment it can take... So I am on the safe side
.
i personally have taken them to 30 bar, some people on this forum have taken them as far as 60 bar, multiple times without failure
Posted: Fri Jul 23, 2010 10:14 am
by c11man
ive been to 45, who takes theres to 60?
Posted: Fri Jul 23, 2010 10:14 am
by zy
spudtyrrant wrote:zy wrote: The problem is that I am a coward, the QEV`s max pressure is 12 bar, and I have no idea how much punishment it can take... So I am on the safe side
.
i personally have taken them to 30 bar, some people on this forum have taken them as far as 60 bar, multiple times without failure
Oh... thats... sick....
. Well, maybe 20 bar wouldnt be so bad?
Posted: Fri Jul 23, 2010 10:16 am
by zy
jackssmirkingrevenge wrote:You might want to try sleeving the barrel as suggested
here, it would look less skinny plus you'd have the benefit of an integral silencer
God dammit now Im sleeving it
... Had some pvc-pipe laying around, but Im out of paint so it will look shitty until I get some new paint.
Posted: Fri Jul 23, 2010 1:35 pm
by spudtyrrant
c11man wrote:ive been to 45, who takes theres to 60?
jeepkahn in the decimator, and maggotman(not the best example lol)
Posted: Fri Jul 23, 2010 5:43 pm
by jackssmirkingrevenge
zy wrote:Gosh darnit now Im sleeving it
If you're going to increase the pressure, you'll need the extra suppression
Posted: Fri Jul 23, 2010 5:48 pm
by jakethebeast
hey that looks cool
this is offtopic but i just dont want to make a new topic out of this: 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? if so, do the small qev need to have a spring?
Posted: Fri Jul 23, 2010 5:50 pm
by jackssmirkingrevenge
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
if so, do the small qev need to have a spring?
no