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French air canon : The 404 not found

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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French air canon : The 404 not found

Unread postAuthor: Sedalc » Sun Apr 26, 2009 7:10 pm

Hello , I'm french. Sorry for my English but I use the voila translator therefore I hope that you will understand the bulk.


Total length : 1m20
Weight : 3 or 4 Kg
Caliber : 5.5mm
Pressure : 1bar to 25 bars / 15 to 360 psi
Speed : 175m.s-1
Power (J)] = 8J with a 5.5 projectil
Loading: Bolt action
Valve : Homemade 3/4 Qev
Barrel : 1m 6mm
Chamber : 1m 16mm

With 6 liters chamber = 30/35 fires
With 1 liter chamber = 5 fires
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SDC13971.jpg
SDC13973.jpg
Ammo before and after fire :p

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Unread postAuthor: far_cry » Sun Apr 26, 2009 7:21 pm

hey nice canon you have
so with thews pellets how is the accuracy ?can you hit 5" target from 50 meters ?
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Unread postAuthor: starman » Sun Apr 26, 2009 7:37 pm

It looks a little like it came straight out of the brass section of the French Army band.... :wink:

It does look unnecessarily complex but plenty sturdy and well constructed, especially for being soldered copper. Some action video is always appreciated.

Welcome to Spudfiles!
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Re: French air canon : The 404 not found

Unread postAuthor: Technician1002 » Sun Apr 26, 2009 7:47 pm

Sedalc wrote:Hello , I'm french. Sorry for my English but I use the voila translator therefore I hope that you will understand the bulk.


Total length : 1m20
Weight : 3 or 4 Kg
Caliber : 5.5mm
Pressure : 1bar to 25 bars / 15 to 360 psi
Speed : 175m.s-1
Power (J)] = 8J with a 5.5 projectil
Loading: Bolt action
Valve : Homemade 3/4 Qev
Barrel : 1m 6mm
Chamber : 1m 16mm

With 6 liters chamber = 30/35 fires
With 1 liter chamber = 5 fires


Does it really have a length of pipe and 180 bend between the QEV and barrel? How much dead space does it have between the valve and projectile? :?: Looks nice. I haven't seen the larger pipe used as barrel supports like that. Nice.
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Unread postAuthor: Hotwired » Sun Apr 26, 2009 7:53 pm

Welcome to SF


I like a bullpup design, gets a lot of barrel in.

But there is a point where even I would say, right, this should not be built as a bullpup :wink:

Interesting build. Next time I think you should try to get a little less space between the piston valve / QEV and the barrel, it'll improve performance I promise :)
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Unread postAuthor: inonickname » Sun Apr 26, 2009 8:59 pm

Welcome to spudfiles

Asides from trying to reduce some dead space this is a nice, well constructed and impressive cannon. It will be good to see what you can pull off in the future.
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Unread postAuthor: daniel323 » Sun Apr 26, 2009 9:46 pm

Great gun. I love the clean design but..

as everyone said before.. reduce the deadspace.

great gun and a video would be awesome :o
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Unread postAuthor: Sparkie » Sun Apr 26, 2009 10:20 pm

Looks like a great plinker. What sort of accuracy?
You need to mount the scope better but looks like you have it all set up for good fun.
I like the baby bottle setup. allows for a few shots before refilling. I got sick and tired of constantly pumping up my pvc gun with a hand pump.
Well done and welcome to Spudfiles
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