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Portable "Snappy Tom" Pneumatic Cannon

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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Portable "Snappy Tom" Pneumatic Cannon

Unread postAuthor: Ronaldo Sanchez » Wed Mar 05, 2008 5:08 am

This is my first pneumatic cannon, Snappy Tom. It's fully portable and self contained.

Valve - Modified Nylex Rainbird composite.

Chamber/stock - Class 18 pressure rated PVC.

Air supply - In-built compressor and 2000 mAh battery pack.

Barrel - Screw-on interchangeable. The pictured barrel is airsoft sized aluminum tubing in a steel sleeve.

Not pictured - 25mm spud barrel, car adapter.

So far I've only tested it with crappy plastic pellets but it penetrates the bottom of a coke can at as little as 30 - 40 psi.
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Unread postAuthor: Carlman » Wed Mar 05, 2008 5:16 am

well done mate, a little cleaning and tidying up here and there wouldnt hurt but yea. :D

now as to you on board air compressor, noice :D

how much flow does that thing have mate?, ie how long does it take to fill to say 50psi?

and your aussie aye? :D
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Unread postAuthor: Killjoy » Wed Mar 05, 2008 5:26 am

Hey that looks pretty cool. Nice work with the compressor you don't see that much around here.
Maybe a little paint to top it off?

Nice work
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Unread postAuthor: Ronaldo Sanchez » Wed Mar 05, 2008 5:33 am

Cheers!

Yeah it would look a lot nicer with some paint on the stock.

With the 7.2v battery pack it takes a bit over 10 seconds to get to 50psi, even faster when running from 12v.

I'm Aussie indeed, have read a lot of your posts, good stuff.

I forgot to mention that I paid $1 for two of those composite valves at a junk yard. They were in new condition but packaging had been opened and resealed with tape so I was expecting one of them to be faulty. They both work fine, still can't believe it.
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Unread postAuthor: jackssmirkingrevenge » Wed Mar 05, 2008 5:59 am

Nice effort to have it self contained, but I would recommend scrapping the electric pump and just carrying a good 150 psi or so bike pump with you, it's just as portable and the difference in performance will be impressive. Your construction should be able to take that sort of pressure easily.
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Unread postAuthor: Mitchza89 » Wed Mar 05, 2008 7:26 am

Ypu've done very well here mate. I love gun's that are different :D
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Unread postAuthor: rp181 » Wed Mar 05, 2008 9:05 am

Is that blue primer? :shock:
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Unread postAuthor: bigbob12345 » Wed Mar 05, 2008 9:11 am

blue primer is quite common out of the us.
And very nice gun I too like the onboard compressor idea.
but a paint job would really help in the acstetics department.
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Unread postAuthor: Jared Haehnel » Wed Mar 05, 2008 9:38 am

Hey, I like it the blue primer adds a nice touch.

Never thought to include an on board air compressor... way to go :D
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C02 tank hybrid
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Unread postAuthor: SNDM » Wed Mar 05, 2008 10:39 am

Hell, my primers transparent.

I feel as though Im missing out on sumpthing.

Anyway, nice wiork on the cannon!
Looks pretty tasty.
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Unread postAuthor: Ronaldo Sanchez » Wed Mar 05, 2008 11:03 am

Thanks for the feedback guys! Looks like it's getting a paint job. :wink:

I've been hesitant to paint the stock because I really want to use a high quality clear coat as it's handled so much, and I'm pennyless at the moment.

Might have to just chuck on a couple of coats of gloss black for now and post some more photos + damage pics.
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Unread postAuthor: cenzo188 » Sat Mar 08, 2008 12:45 pm

I like the idea of and integrated(sp?) compressor. how many fills does the battery last for and how long does it take to fill to NOP?

for people who dont know, NOP= Normal Operating Pressure
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Unread postAuthor: Carlman » Sat Mar 08, 2008 8:40 pm

cenzo188 wrote:does it take to fill to NOP?

for people who dont know, NOP= Normal Operating Pressure


it would have been less typing to put normal operating pressure in the first place lol
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Unread postAuthor: Ronaldo Sanchez » Sat Mar 08, 2008 11:12 pm

cenzo188 wrote:I like the idea of and integrated(sp?) compressor. how many fills does the battery last for and how long does it take to fill to NOP?


for people who dont know, NOP= Normal Operating Pressure


Cheers, the air compressor is one of those $12 affairs that claim to reach 300psi but struggle to get to 100psi.

The battery lasts around 20 - 30 shots.

It takes about 15 seconds to get to my NOP (70psi) but it slows down as the battery loses charge.
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Unread postAuthor: Novacastrian » Sat Mar 08, 2008 11:29 pm

Only just noticed this new cannon, i like it. I like the fact that you don't have to pump the sucker up, as JSR said you could achieve better results from higher pressures but i personally would like being able to fill my chamber without pumping.
Great work mate. :wink:
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