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(42mm piston valve) copper marble gun and hybrid

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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what cannon is the best so far?

hybrid
1
10%
pneumatic
5
50%
bouth
4
40%
crap
0
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Total votes : 10
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(42mm piston valve) copper marble gun and hybrid

Unread postAuthor: SpudFarm » Tue Jan 08, 2008 1:07 pm

first off i want to tell that the copper pneumatic is galfisks construction but the piston that was in it cracked so i made one new.

yeah. pneumatic: the chamber is 42mm copper pipe 1.6 feet long and the barrel are the same as on the hybrid. one for marbles (6 feet) and one for small spuds and big marbles 1" copper (3feet).

the pneumatic runs on 150psi now but would be 270psi soon. the piston are made from a screw with a sealing face bacicly. i cut a piece of steel plate to fit the diameter of the chamber and put in the back of the sealing face. there are no o-rings or something the sealing face fits perfect and it is enough (pilots really well)! it has a fairly easy bumper system too. i just cut a piece of rubber hose that fits the screw and push it on. (pics to come)

hybrid: the chamber is made out of 2" by 8" steel pipe. i used couplings to connect the bushings(?). the valve you can see is a 1/2" hydraulic valve 15000psi or so and the union is 1". it uses the same barrels as the pneumatic. the propane meter is on the way in the mail but takes a while :(

i am norwegian am crappy in english! and if something is missing in this post just let me know and damage to come! please comment

sorry! the pics starts at the bottom
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Attachments
DSC00890.JPG
pnematic in basement winter range
DSC00891.JPG
pneumatic again
DSC00892.JPG
pilot (used a water valve because it has a sieve(?) in there so no dirt and stuff gets in)
DSC00894.JPG
the hybrid
DSC00895.JPG
hybrid from the back
DSC00896.JPG
size comparission
DSC00897.JPG
a battery shot at a steel plate (pneumatic)
DSC00900.JPG
as you can see it hit sideways
DSC00901.JPG
strange effect its a welding rod shot in the snow (it was hard snow)
DSC00901.JPG (36.72 KiB) Viewed 1296 times
Last edited by SpudFarm on Tue Jan 08, 2008 4:50 pm, edited 3 times in total.
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Unread postAuthor: th3p0p0 » Tue Jan 08, 2008 1:25 pm

nice guns. that piston gun is beautiful for sum reason i like it allot. Its seem to have lots of power to :lol: . good job on the hybrid. what mix's do plan to use with it?
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Unread postAuthor: SpudFarm » Tue Jan 08, 2008 1:31 pm

yeah galfisk has done a good job huh? :wink: and the pneumatic is massivly powerfull for 150psi! and the hybrid would be used in my hands at 4x but remotely on about 6 or 7x (scary)

BTW you can say som stuff i can shoot so i can get some good damage?

thanks
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Unread postAuthor: th3p0p0 » Tue Jan 08, 2008 2:02 pm

old computer screens are fun to shoot. shoot a coffee can with water in it thats cool cuz its hard to shoot through both sides.
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Unread postAuthor: SpudFarm » Tue Jan 08, 2008 2:09 pm

okay mabe i get some pics of a can later this night :wink:
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Unread postAuthor: SpudFarm » Tue Jan 08, 2008 2:37 pm

i shot a tin can filled with water and two beer cans with water!

forgot one more time the pics upside down :P
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Attachments
DSC00908.JPG
this is the tin can when shot the lid went 20 feet in the air and got cought by the wind!
DSC00909.JPG
entry
DSC00910.JPG
exit (i like to tel when it is exit holes)
DSC00911.JPG
beer can shot with 16mm marble
DSC00914.JPG
beer can shot with a loose packed aluminiumfoil ball with 1" barrel (weight 2 grams)
DSC00915.JPG
can from above!
DSC00905.JPG
look carefully and you can tell there is dents by marbles in the steel plate
DSC00906.JPG
hole in steel plate!
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Unread postAuthor: seudo411 » Tue Jan 08, 2008 3:08 pm

Those are two very impressive cannons, would have preferred a pneumatic in the style of your hybrid, with a mortar sight and bi-pod, but they are beautiful, how do you vent the hybrid, I assume through the valve, at the rear of the cannon, as for more ammo alternate layers of melted solder and perspex or hard plastic, bolt down the center.
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Unread postAuthor: SpudFarm » Tue Jan 08, 2008 3:16 pm

thanks seudo!

yeh i just rush some air through the filling valve on the hybrid!
and for ammo i have used lead slugs but keepem comming guys :wink:
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Unread postAuthor: th3p0p0 » Tue Jan 08, 2008 3:22 pm

holy crap :shock: thats sum power right there.
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Unread postAuthor: BigJon » Tue Jan 08, 2008 3:23 pm

Dang! what did you hoot that steel plate with and how thick was the plate? That is some impressive damage.
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Unread postAuthor: SpudFarm » Tue Jan 08, 2008 3:34 pm

thanks th3 and big!

the plate was a thing to hold snowmobiles up on drag races so there was a licence plate on it on the other side so i shot on the licence plate so it dented a licence and a 3 or 4 mm thick steel plate :lol: spuds also dent it but thats more like bending it! BTW it was a 16mm marble i think i could have got penetration with a 1" marble and 270psi

i think it is so fun to get comments that positive :) :oops: i am petty strange that way
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Unread postAuthor: MrCrowley » Tue Jan 08, 2008 4:24 pm

Wow the pneumatic is really nice looking and the hybrid looks so big and deadly for that matter.

Great Job. :)
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Unread postAuthor: Brian the brain » Tue Jan 08, 2008 4:33 pm

Galfisk inspired me to build metal pneumatics...

I love his work
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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: SpudFarm » Tue Jan 08, 2008 4:33 pm

thanks crowley :wink:
all of you just think "ohh why didn't he build it himself" i tell you it was pretty long time ago now. when i worked with ballvalves and didn't understand the piston valve concept so i asked him to make one for me so i could try to understand and now i think like "ohh i shouldn`t get him to build it i could have got all credits my own" lol
do NOT misunderstand that :D
it is soo easy when you first get it!

he did a wonderful job on it

yeah brian! but he is down with cannons sadly :roll: he has begun with other stuff jus hopes he takes his cannons (and for that matter complete the hybrid its going to be soo sweet if he asemble it) just hopes he returns to us!
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Unread postAuthor: Hotwired » Tue Jan 08, 2008 4:36 pm

Y'know traditionally we refer to the pipe size used as the barrel not the chamber :P

I was about to say that 42mm was a hell of a size for a copper barrel then noticed it seemed a bit skinnier than expected.

How is it being piloted? It looks like theres just a schrader valve the end and I'm not seeing the 'water valve' or I am seeing it and not realising how it's working.
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