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building my first pneumatic with hammervalve full metal

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: Hawkeye » Fri Jan 27, 2012 7:02 pm

I'm trying to picture how this thing is going to be held...
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Unread postAuthor: quark1980 » Fri Jan 27, 2012 7:18 pm

Hawkeye wrote:I'm trying to picture how this thing is going to be held...


think "bullpup" style..

Image

Image

see what im thinking of?
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Unread postAuthor: Hawkeye » Fri Jan 27, 2012 7:59 pm

I just meant that the upper part of the stock doesn't really look very face friendly.
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Unread postAuthor: quark1980 » Sat Jan 28, 2012 4:06 am

oh right.


that actually isnt that bad at all. the corners are not 90 degrees on the rear side of the stock..

when i get this thing to work as intended, i might add some padding there :P
im tinking maybe some adjustable cheeckrest, or something simular.
ill have to see how thinks work out really.. :P
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Unread postAuthor: quark1980 » Mon Jan 30, 2012 5:11 pm

halfway done with the hammer... i need of a decent spring...

now i know why an inlinehammer inside a tube is definitely easyer :/
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Unread postAuthor: Gun Freak » Mon Jan 30, 2012 6:30 pm

Haha nice. Mine was very simple. You can see the video in my thread.
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Unread postAuthor: quark1980 » Tue Jan 31, 2012 4:31 pm

nice.

for testing i might resort to rubber bands as a spring...

te hammer itself i quite sturdy...

now i just need to focus on the triggermechanism...
still looking for the right parts atm... i had the idea to make the handgrip and trigger 2 piece, wich can be mounted underneath the alu stock...

i need ot find a piece of u-profile with a inner spacing of 50mm tough...
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Unread postAuthor: quark1980 » Wed Feb 01, 2012 12:55 pm

yay, finally finished my barrel :)

i found an aluminium tube with a stainless steel thicker endpiece on it.

i build the breach, and made a connection for the air inlet.

the stainless steel was kinda tough stuff to work on with only basic tools :S
it turned out quite good... would love to have accses to a mill and lathe tough :P

anyway, some pics for youre entertainment :)

look into the breach, and see the inlethole:
Image

breach closed:

Image

Image

the pieces:

Image

Image

the bolt should just push the projectile in front of the air inlet in the barrel... so it exits on the right side of the tube :P
Image
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Unread postAuthor: quark1980 » Fri Mar 30, 2012 10:18 am

ok,

so i did something every first-timer does... changed my mind about the design.....
:roll:


im gonna use the barrel and breach, and im going for a QEV type of gun to get used to building pneubs...
after a lot of reading, i now know that larger calibers dont go whell with hammer valves and lower pressures...


so redesign.

i wanted to build a selfcontained, single shot "sniper" suited for different types of ammo... the barrel is 15mm or 0.59 in inches...
selfcontained means it has a pump under the barrel wich can get the gun to pressure of 10 bars in approx. 25 strokes.. good enough for now...
nerf darts fit perfect..... good for testing....
i also made a mould to make some "tougher ammo"

i found a pop off valve used in a compressor wich i have adapted to work like a QEV. only needed to epoxy a hole shut to make it work...
only downside is that my pilot valve is located a bit akward, but i think i found a decent solution...

now for some pictures, i only need to build a stock frame to hold every part together, but that quite easy to do, just need to find a nice piece of wood to make it...

the trigger mechanism and its location, note the odd QEV vent valve:
Image
Image

the trigger mechanism, speaks for itself i guess:
Image
Image

the mould, with a buck type of ammo... steel bb`s encased in wax...:
:twisted:
Image

it does make a nice hole on just 8 bars, 4 mm plywood target:
Image

and lastly, something what suprised me, a nerf dart shot at a plastic toy:
quite some damage for a piece of foam :!:
Image :!: :!:
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Last edited by quark1980 on Fri Mar 30, 2012 10:55 am, edited 1 time in total.

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Unread postAuthor: killerbanjo » Fri Mar 30, 2012 10:38 am

Really nice mate, come along scince you sent me those pics on the chat :D
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Unread postAuthor: Brian the brain » Fri Mar 30, 2012 1:18 pm

I love that thing!!
Great job so far!

Just so you know, you could use a hammer valve with a QEV.
I did in Old Shatterhand and it works very well.

You must have a lot of dedication to cut out all that stainless!
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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: quark1980 » Fri Mar 30, 2012 2:04 pm

brian, ik zal het maar even melden(that was dutch ;) ), youre build with the inline pump was kinda inspiring my builds...

and yes, cutting the slot in the stainless was rather accompanied with some sweat :P

ik like to have something portable, with an "onboard" manner of compressing the needed gas :P



next build wil be either a 17mm bore(paintballs), or ill go pellet size....
either way, it will be semi.

need to first finish this one, build from mostly salvaged materials.

need to think of a decent way to build the rest of the stock, so the trigger mechanism will stay where its needed, in a way it still looks good...
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Unread postAuthor: jackssmirkingrevenge » Fri Mar 30, 2012 2:43 pm

I love the waythis looks like it was cut with a hammer and chisel :D coming along nicely.
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Unread postAuthor: Brian the brain » Fri Mar 30, 2012 3:21 pm

Eindhoven de gekste!

Build with inline pump?
You must mean the lever action one... :roll:
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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: quark1980 » Fri Mar 30, 2012 4:07 pm

yup, the lever action one 8)


@jsr:

close.... a file and a metalsaw (or is it called hacksaw?)

did use the angle grinder for the rougher pieces tough :P


now for the stock, i like wood, but i doenst need to look like a commercial airgun. and with my skill ill probably gonna paint it all black (and silver)

the trigger mechanism wil be slapped to the back, and will be sandwiched in between some wood/metal strips coming from the wooden barrel support, so it will be one rigid piece.
if all that is to my liking i want to make a detachable butstock...

at least, thats the plan... in not that great with wood, so its taking more effort to build the stock then it took building the valves... :roll:


edit:

got me a shitty pic, need stock and need to repair my red-dot.

Image

edit 2:

fixed the reddot... need to build a rail :)

Image
Image
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