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MMK-3 French QDV airgun

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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MMK-3 French QDV airgun

Unread postAuthor: Mimikool » Sat Apr 23, 2011 2:09 pm

Hi all ! :)

I've just seen the french airgun, of Driveround3, so i hope you will not be disappointed ^^

It's a simple coaxial QDV airgun, i shoot marbles and compressed aluminum paper.

I make a small butt just to have a good grip, it's not really clean but i don't want to work on it, i've a 1"1/2 qev airgun witch will be finished during this holidays.

It work at 15bar (200psi) for now, but 20bar (300psi) when i'll have my freege coompressor.

Image

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I've tried to make a rifled barrel, but only in muzzle, and it's inefficient, i'll make another but fully, when i'll build an HP qdv canon from my first that a ever present here.
Image

Vidéos :
[youtube]http://www.youtube.com/watch?v=fboWlf8G0iE[/youtube]

[youtube]http://www.youtube.com/watch?v=Q9eLPHV1wCE[/youtube]
And others one my channel ;)
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Last edited by Mimikool on Thu May 05, 2011 6:06 am, edited 1 time in total.
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Unread postAuthor: mark.f » Sat Apr 23, 2011 2:14 pm

Nice rifling button. :)

One thing I notice is that a lot of you French airgunners dress up your cannons with wood, but never stain it?

Beautiful cannon, nonetheless. Nice to see more people building with hand-built parts and valves over ready-made QEV's or irrigation valves.
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Unread postAuthor: Gun Freak » Sat Apr 23, 2011 2:20 pm

I've just seen the french airgun, of Driveround3, so i hope you will not be disappointed ^^

HAHAHAHA :lol: This is very cool still! I want one :)
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Unread postAuthor: jackssmirkingrevenge » Sat Apr 23, 2011 2:34 pm

Very nice, any chance of seeing the piston itself?
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Unread postAuthor: MRR » Sat Apr 23, 2011 2:45 pm

A nice build indeed, but I don't see the advantage over a simple coaxial design, regarding opening time and handling.

A short "fat" chamber and inline ports would be the better choice for a QDV style valve.
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Unread postAuthor: Mimikool » Sat Apr 23, 2011 2:50 pm

Thanks all :)

For the wood part i apply a cleancoat, or else it stains yes, as my first airgun's butt.

For the piston i haven't got photos now, but before. Today, the space between ths two seat is smaller, and the o-ring is now directly bonded at the large washer for the seat of the baril (at right in picture).

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Unread postAuthor: mark.f » Sat Apr 23, 2011 2:54 pm

Mimikool wrote:For the wood part i apply a cleancoat, or else it stains yes, as my first airgun's butt.


Confounded language barrier. :D I was asking why nobody ever applied a colored wood stain?
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Unread postAuthor: Mimikool » Sat Apr 23, 2011 3:02 pm

Oh, sorry, google translate is so bad... :D But now i'm not sure to understand, but no we prefere not to paint.

I thinks, a lot of us want to keep the wood color, it's more beautiful, a mater of taste :D
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Unread postAuthor: Mimikool » Fri Apr 29, 2011 1:01 pm

I don't want to create a new topic, so I present my airgun MMK-2 here.

It will work at 40bar (580psi), but for now, only 10/12bar (150psi)

[youtube]http://www.youtube.com/watch?v=6WXjlt2xIyE[/youtube]
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Unread postAuthor: Doctore » Fri Apr 29, 2011 1:22 pm

Nice airgun

why did you put a ball valve at the end of the chamber???
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Unread postAuthor: mark.f » Fri Apr 29, 2011 3:13 pm

If I had to guess it's a safety thing. At any time he can completely dump the chamber quickly without having to discharge the launcher.
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Unread postAuthor: jackssmirkingrevenge » Fri Apr 29, 2011 7:54 pm

Doctore wrote:why did you put a ball valve at the end of the chamber???


Underbarrel grenade launcher :D
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Unread postAuthor: Gun Freak » Fri Apr 29, 2011 8:13 pm

Mon dieu, that valve is beautiful!
Why must the french do it so well... :P
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Unread postAuthor: Mimikool » Sat Apr 30, 2011 4:22 am

Thanks :D

There is a ball valve at the end oh the chamber because, before, i've put the shrader valve here, on the valve.

But after i replace it behind the piston on the ball valve as you can see ;)

I haven't got cap for now, so the ball valve is good as i don't put hight pressure.
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Unread postAuthor: Major Collins » Thu May 05, 2011 7:55 am

jackssmirkingrevenge wrote:
Doctore wrote:why did you put a ball valve at the end of the chamber???


Underbarrel grenade launcher :D


without a barrel? haha nice build
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