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AMG Fe qev gun!!!!

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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AMG Fe qev gun!!!!

Unread postAuthor: spudthug » Fri Mar 23, 2007 2:45 pm

ok guys this is my first all metal gun...i am very proud of it...except my soldering... but anyway this is going to be run at 200-250 psi....but i test fired it today about 5 mins ago just at 50 psi and some air is going out the barrel but alot is going right back through the blowgun....i was wondering if i had me qev the wrong way or jsut a blowgun u cant use...tell me if anyone has used this type of blowgun and if u cant use it in pneumatics...or is it my qev...well my blowgun is called amflo and i think its generic...its just temporary but why isnt my gun working....ughh


EDIT: ok guys here is my gun with new paint, blowgun, scope, 1 foot off the barrel, and quick disconnect!!!
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Attachments
IMG_0237.JPG
crappy blowgun....defective or something
IMG_0236.JPG
this is the qev i think it is right though cause the letters on it say in, something, and exh and i put exh (exhaust?) going to my barrel and the in to my blowgun
IMG_0235.JPG
all my chamber/ valve hook ups
IMG_0234.JPG
my masterpeice
IMG_0244.JPG
SWEET NEW PAINT!!!!!
IMG_0243.JPG
new quick disconnect and valve setup
IMG_0242.JPG
new paint, blowgun, scope, 1 foot off the barrel, and quick disconnect!!!
Last edited by spudthug on Sun Mar 25, 2007 1:46 pm, edited 2 times in total.
4" piston valved cannon-half done..( i spilt my cement...)

Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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Unread postAuthor: spudthug » Fri Mar 23, 2007 2:54 pm

WTF??? i just looked at the valve i bought and it says maximum pressure is 125 psi!!!!!!! omg is it ok to use it past that has anyone done it??will my qev not blow up...??
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Unread postAuthor: spudthug » Fri Mar 23, 2007 3:18 pm

oh wow 15 veiws on this already and not one post...i need help people come on!!!
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Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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Unread postAuthor: MrCrowley » Fri Mar 23, 2007 3:42 pm

If you forced that FE on to a fitting I wouldnt trust it at 200psi. And for the valve it wont explode,the seal will just fail after awhile and screw it up and probably would never seal properly again. Other then that nice looking gun. :P
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Unread postAuthor: pyromaniac » Fri Mar 23, 2007 3:47 pm

the brand of blowgun is fine cuz ive seen it on plenty of guns. maybe you jsut got the defective one of the bunch.
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Unread postAuthor: A-98 » Fri Mar 23, 2007 4:20 pm

it almost impossible to have a defective blowgun. i have no idea why the qev isn working, but does it say which ports are which? if so, are you sure that its connected to the correct ports.

oh and thanks for giving me credit for helping design the gun, and finding the QEV.......................................(get the point?)
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Unread postAuthor: noname » Fri Mar 23, 2007 4:22 pm

The design is exactly the same as jave101's newest piston valve gun, he would get the credit.
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Unread postAuthor: A-98 » Fri Mar 23, 2007 4:27 pm

i helped design it to his needs, with the qev, pilot layout. his original design was Jave's exaclty.
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Unread postAuthor: spudthug » Fri Mar 23, 2007 4:40 pm

yea sorry A-98 i was in a hurry to post this because i was going to my dads and he lives in another town so i just threw together a post..i was gonna edit it to when i got my gun done completely and i used javes gun for a guideline but not as an exact...and A-98 helped me through all of it...without him i would not have this gun........btw thanks a-98...pretty much all of the credit goes to a-98 because my gun would have a crappy a$$ valve on it or something that wouldnt work and id have like everything the wrong way...i bought a new blowgun and am gonna try it soon....ill post the results
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Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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Unread postAuthor: spudthug » Fri Mar 23, 2007 5:06 pm

ahhhh!!!!!!!!it still leaks out the blowgun!!!alot!!!! ok here is what my valve set up is....ok there is words on it....one is IN, one is CYL, and one is EXH. i hooked up EXH to the barrel side....CYL to the FE side(chamber) and IN to where the shrader valve is....what is wrong ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh!!!!!!!!!!!!
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Unread postAuthor: MrCrowley » Fri Mar 23, 2007 5:15 pm

Try EXH for the port(blowgun) and IN for the Chamber and CYL for the Barrel...I havn't used a QEV before but thats how I think it would go if what your doing doesnt work....though your way makes more sence to me but just keep testing out different combinations till you get it.
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Unread postAuthor: spudthug » Fri Mar 23, 2007 5:20 pm

i know that cyl has to go the the FE but maybe in and exh are mixed up.... i will wait 10 mins to see if anyone else posts before i screw this up but if not ill try that crowley
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Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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Unread postAuthor: MrCrowley » Fri Mar 23, 2007 5:26 pm

Hmm well I don't see why the Barrel would be IN...exhaust suites it more, though exhaust does suite fill/port station as well, But so does IN.
Hmm I wouldnt personally use a schrader as when you disconnect them they let out a tiny bit of air which is enough to port a QEV.
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Unread postAuthor: spudthug » Fri Mar 23, 2007 5:34 pm

idk whats wrong but since no one else posted ill try it now...
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4" piston valved cannon-half done..( i spilt my cement...)

Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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Unread postAuthor: A-98 » Fri Mar 23, 2007 5:38 pm

ya, i had forgotten to mention tht spudthug, it would be a wise idea to put a 1/4 ball valve between the schrader and gun. i havent heard specific examples of that happening, but it could.

and i wasnt angry, i was just kidding about the credit thing. i didnt do too much, just altered the design.

and its looking good, i would pollish the barrel, and put a laquer(sp?) on it. and i would paint the galvanised fittings matte/shiny black. leave the FE as is.
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