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GPS Targeted Pneumatic Launcher

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: charred_cookie » Fri May 23, 2008 9:35 am

Well about two years back I posted my idea for the project on the Spudtech forum. I have since forgot my old name and password, so I just created a new one.
The computer is connected to a rabbit proccesor via an ether net cable. (I think someone asked)

Im sorry, I know this is still vary vage. But I should be able to put some stuff up tonight.

And when it comes to video I think yall will be happy. I had some profesional high speed video take to confirm the muzzle velocity. Its pretty sweet looking! Yall will hopefully enjoy it!
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Unread postAuthor: charred_cookie » Fri May 23, 2008 9:06 pm

Ok so here is some more stuff on my Project.

Sadly all of my data is recorded in a notebook, and are not on my computer. And the videos are far to large to Post. :(
I will try to scan some of the important stuff and post it a little later on.
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Attachments
Cannon Photo.JPG
The Launcher
Pneumatic Launch System.JPG
This is a Block Diagram of how the various componants interact in the Launcher.
Drag Equation.JPG
A Diagram of the various Calculations used.
Screen Grab.JPG
This is a Screen Shot of the UI of the program I created.
redstone launch.jpg
I was allowed to go onto an army Arsenal and fire at a tank. The tank was 500M away and the results are in the photo. Sadly it was a windy day, so I had poor results.

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Unread postAuthor: STHORNE » Fri May 23, 2008 9:23 pm

very nice work. Not as bad ass looking as I was picturing but still a very nice cannon/program you have made.

I would recommend a jet-black paint job with a few warning decals on it. Hell, maybe even a few different colored led lights around the muzzle for some high-tech pizazz lol.

Again, nice work :wink:
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Unread postAuthor: charred_cookie » Fri May 23, 2008 9:26 pm

Haha yea its not actually all that intimidating looking, But it fires very well and consistently. (Which is what I needed for the project)
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Unread postAuthor: TwitchTheAussie » Fri May 23, 2008 9:39 pm

Kinda reminds of a a mortar. Not as good looking as I thought it would be but hey its got balls and thats what counts for me :thumbright:
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Unread postAuthor: knappengineering » Fri May 23, 2008 9:46 pm

I'm just curious, what did you use to make your UI program? I'm thinking of making something similar.
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Unread postAuthor: charred_cookie » Fri May 23, 2008 9:56 pm

'Lab Windows CVI' was the software I used.
It is super easy to use if you are competent with C, and it has some great example programs if you ever get stuck.

After I finished the project I actually got a call from a guy that worked for National Instruments. He heard that I had used their product for my project, and he wants me to give a talk at one of there quarterly meetings to demonstrate how I had implemented there program.
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Unread postAuthor: knappengineering » Fri May 23, 2008 10:05 pm

That sounds interesting, I'll have to look into it. I was thinking of just using Visual C++ for mine.
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Unread postAuthor: charred_cookie » Fri May 23, 2008 10:15 pm

I dont know how much CVI costs, but it is very similar to Lab View if your familure with that. We use CVI at my work all the time, so I just used it that.
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Unread postAuthor: knappengineering » Fri May 23, 2008 10:20 pm

Yeah, I just looked it up and it is very expensive. I might be able to get Lab View from my robotics team or I'll just use Visual C++ as planned, or maybe even Java.
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Unread postAuthor: MaxuS the 2nd » Sat May 24, 2008 3:08 am

I severely doubt that launcher is capable of firing 600m.

..Got any videos?
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Unread postAuthor: M.J.P. » Sat May 24, 2008 4:22 am

Got specs of the launcher?
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Unread postAuthor: POLAND_SPUD » Sat May 24, 2008 6:43 am

yeah there are no specs of the gun...

that's really amazing project... well even if it is just another PVC pneumatic with a bit of electronics

are you going to upgrade the gun itself ? like make it all steel and fire it at 400 psi ? :twisted:
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Unread postAuthor: M.J.P. » Sat May 24, 2008 7:12 am

Or if you dont wanna give specs atleast a pic with another object in it so we can get an idea the size?
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Unread postAuthor: starman » Sat May 24, 2008 9:46 am

I am interested in the actual pressure sensing and firing devices you used. Also, did you use sound card IO on the computer or something else?

Nice build you have there!

Edit: Opps sorry read it again....you mentioned the Rabbit controller.
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