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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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Unread postAuthor: far_cry » Wed Jul 29, 2009 5:54 pm

no words to say
this is the beautiful air gun i ever seen
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Unread postAuthor: wngovr » Wed Jul 29, 2009 6:31 pm

King_TaTer,
I,ll try to get some pump pics later.

theBOOM,
Theres no telling how much I spent on this thing. Mostly on left overs and parts I ended up not using. I can tell you I spent a lot. With all the stuff I have left over I could almost build another, but all that milling, drilling, filing and sanding is too much effort for what I already have.

Jackssmirkingrevenge,
I thought about putting this gun in the contest but there are only 2 categories. Penetration and innovative idea. This thing is impressive but I don't think it can compete for Penetration and every time I think I've come up with something new, I do a search and sure enough someone has already thought of it. May be they should come up with a category for just plain cool.

Ragnorok,
You made me laugh.
If I want to use a quick exhaust valve valve Ill use a quick exhaust valve valve, ok? Thanks for pointing that out.

Brian the brain,
Greasepump hose. Hmmm You got the gears turning. Thanks for the tip.
Bolt? For some reason I cant sypher them. Thats worse than trying to figure out how a coaxal design works. I guess I should put a little more effort into learning these things, people seem to like them maybe its worth the effort.
Shoulder stock. Originally it was shaped like a coffin. I should have kept it that way.
You want my machine shop? I want my machine shop too. Its where I work. Wich is kind of ironic that my hobby would keep me at work 7 days a week. Maybe I need to find a new hobby.

here are pics of the pump.
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Attachments
bottom.JPG
control arm.JPG
groove for control arm.JPG
inside of head.JPG
open.JPG
outside of head.JPG
piston.JPG
side.JPG
top.JPG
Last edited by wngovr on Wed Jul 29, 2009 7:36 pm, edited 1 time in total.

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Unread postAuthor: velocity3x » Wed Jul 29, 2009 6:39 pm

From design to completion, this gun exudes elegance. It's definitely a product of much thought and serious machining. It's almost to beautiful to use!
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Unread postAuthor: Ragnarok » Wed Jul 29, 2009 7:36 pm

wngovr wrote:Ragnarok, you made me laugh.

People keep telling me that. I keep telling them that any humour they perceive is an illusion.

If I want to use a quick exhaust valve valve Ill use a quick exhaust valve valve, ok?

Well, at least you're a person of conviction.

~~~~~

Bear in mind, innovation is not just about new ideas, but new ways of doing things. I'm sure a built in pump like this (very rare to see done efficiently on a spudgun) would have been perfectly acceptable as far as counting for innovation.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: jackssmirkingrevenge » Wed Jul 29, 2009 8:31 pm

Ragnarok wrote:People keep telling me that. I keep telling them that any humour they perceive is an illusion.


When will they learn?


:D
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Unread postAuthor: Big-E » Fri Jul 31, 2009 12:40 pm

I love how you used the head off a small compressor for your check valve/fill tube assembly. I have a couple of junk compressors with heads like that, and it would make a great solution for the pump I'm putting on my next project.

of course, I'm planning on a traditional stirrup-type pump rod, not like the pump assembly you've got going on.

Just the same, It's an awesome idea, and I can't believe I didn't think of it already.

One of the many reasons I like spudfiles!
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Unread postAuthor: King_TaTer » Fri Jul 31, 2009 12:55 pm

More questions...

What is the range of motion of the piston inside the pump in terms of inches during one cycle?

Is there any way you could show us the piston outside of the cylinder?

How many cycles does it take to attain say, 300 psi? Probably not too many considering the small chamber volume.

Thanks again.
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Materials links:
<a href="http://www.discounthydraulichose.com/">Discount Hydraulic Hose</a>
<a href="http://www.buyfittingswholesale.com/#">Buy fittings wholesale</a>
<a href="http://www.flexpvc.com/">Flex PVC</a>
<a href="http://www.murrayequipment.com">MEI
</a>
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Unread postAuthor: Ragnarok » Fri Jul 31, 2009 1:02 pm

I don't intend to be harsh, but reading a little more closely might be to your advantage. Two of those questions were answered in the opening post...

Question:
King_TaTer wrote:What is the range of motion of the piston inside the pump in terms of inches during one cycle?

Answer:
wngovr wrote:... now the 3/4" piston has a 6" throw.


Question:
King_TaTer wrote:How many cycles does it take to attain say, 300 psi? Probably not too many considering the small chamber volume.

Answer:
wngovr wrote:... so pumping up to 300 lbs. is a breeze. About 35 to 40 pumps.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: King_TaTer » Fri Jul 31, 2009 2:17 pm

Dang, I really need to pay attention. I won't make excuses. :(

My bad Rag. I know how that aggravates you.
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Materials links:
<a href="http://www.discounthydraulichose.com/">Discount Hydraulic Hose</a>
<a href="http://www.buyfittingswholesale.com/#">Buy fittings wholesale</a>
<a href="http://www.flexpvc.com/">Flex PVC</a>
<a href="http://www.murrayequipment.com">MEI
</a>
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Unread postAuthor: Ragnarok » Fri Jul 31, 2009 2:34 pm

King_TaTer wrote:I know how that aggravates you.

Crap, I'm turning into some form of tyrant.

...nah, I wasn't aggravated. Heck, I nearly asked one of those questions myself in my first post until I doubled back to check. The first time, I think I got... ooh, shiny launcher.

Sorry, where were we?
I was saying it more in your interests - for one, it saves you time, and for two... I forget, but three... no, I forget that as well.

It's understandable though. I kinda hate posting something which is just a dull "Great cannon, dude" type comment (although usually slightly more eloquent linguistically).
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: spudtyrrant » Fri Jul 31, 2009 2:42 pm

Ragnarok wrote: Crap, I'm turning into some form of tyrant.

uhum...... :lol:
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Unread postAuthor: King_TaTer » Fri Jul 31, 2009 3:54 pm

No I was the dumbass that didn't double check. :?

I'ts my fault and I deserve the humiliation.

Now that we are back on topic, Did you ever consider making Barrel sealing piston for this gun wngovr?
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Materials links:
<a href="http://www.discounthydraulichose.com/">Discount Hydraulic Hose</a>
<a href="http://www.buyfittingswholesale.com/#">Buy fittings wholesale</a>
<a href="http://www.flexpvc.com/">Flex PVC</a>
<a href="http://www.murrayequipment.com">MEI
</a>
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Unread postAuthor: django » Fri Jul 31, 2009 10:27 pm

Great work man, simply fantastic work there and I can see a lot of time has gone into construction,Ive not posted up any footage of my semi in action :oops: but I'd love to see this gun's damage footage mate!...........
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Unread postAuthor: wngovr » Fri Jul 31, 2009 10:30 pm

Hey, thanks for all the positive posts guys, Im glad you like it.

King_tater,
I don't want to take the piston assembly out because i put super glue on the pins to keep them from working their way out and scoring the cylinder walls. I drew this picture to try and show you whats inside. The piston had a piston arm attached to it so I drilled a hole in the end of a nylon rod big enough to allow the piston rod, then drilled another hole to put a pin through the piston rod. There is a little space between the piston and nylon rod to allow the piston to move freely just a little separate from the nylon rod.

Yes I considered making a piston valve, but I've never made one before so I would probably have to make two or three before I found a system I liked. Just so happened that I found this q.e.v. in a junk box at work. It didn't take long to see how the gun could be built around it I guess you could say I took the easy way out.

The q.e.v. and the pump leaked when they got over 300 lbs., so I bought some slightly over size square o rings. I put them on yesterday and pumped it up to 400 lbs. took 75 stokes. then I remembered the tube is only rated at 300 psi, so I ordered some grease gun hose. My pressure gauge goes up to 500 lbs. If I keep pumping something is going to blow. I imagine the piston seal or the pump head valves will go first. What do you guys think?

Just remembered, I ordered a 5 inch black foam blowgun handle to put on the end of the barrel. Just for looks. If I drill a bunch of holes at the end of the barrel under this foam, will it work as a bit of a silencer?

Small metal sprinkler type valve, or q.e.v. or solenoid valve:
http://www.mcmaster.com/#solenoid-valves/=2zrm7p
part no. 4738k138

Trigger:
https://www.shoprutlandtool.com/webapp/ ... ogId=10001
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Last edited by wngovr on Fri Jul 31, 2009 11:35 pm, edited 2 times in total.

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Unread postAuthor: colty-bear » Fri Jul 31, 2009 10:34 pm

i want one mind pm me the specs?
where you get small metal sprinkler type valve
what is the trigger
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My first 300 spud bux.
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