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T.D.U -Thunder Down Under

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: JDP12 » Sun May 11, 2008 2:28 pm

haha nice.....yea you can only get in trouble so much lol... kidding (n00bs don't follow this advice then come and post OMGZ GUYZ THE COPS JU5T ARR3ST3D ME FOR SHOOTING A SGN!!)

Thanks...haha... couldn't resist the last part there
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"Some say his pet elephant is pink, and that he has no understanding of "PG rated forum". All we know is, he's called JSR. "
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Unread postAuthor: Sticky_Tape » Sun May 11, 2008 2:59 pm

Is that bell reducer pressure rated?
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You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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Unread postAuthor: MrCrowley » Sun May 11, 2008 3:08 pm

Sticky_Tape wrote:Is that bell reducer pressure rated?
He's Australian, of course it is :D




No, but really it is. Aussies have magical pressure rated bell reducers... :(
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Unread postAuthor: Carlman » Sun May 11, 2008 7:46 pm

MrCrowley wrote:No, but really it is. Aussies have magical pressure rated bell reducers... :(


yea its great, its actually easier to find them then a bushing :D
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Aussie spudders unite!!
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Unread postAuthor: watto » Sun May 11, 2008 9:49 pm

watto wrote:and if anyone asks me if my bell reducer is pressure rated ill shoot them
Sticky_Tape wrote:Is that bell reducer pressure rated?


Imma keeeel you sticky_tape :banghead: :lol:
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Unread postAuthor: watto » Mon May 12, 2008 7:24 am

Just got back from shooting that sign, sounded like I hit it right in the middle from 40-50m but it was night and I had to bail cos this cleaning lady was getting suss, so I didn't see the damage but I'll go there tomoz with a camera. I didn't hear it bounce off so I'm hoping for a hole through the sign but doubt it (this metal looked thick as)
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Unread postAuthor: Carlman » Mon May 12, 2008 11:50 am

Just got back from going spudding...err golf balling with Watto!

the shots were done at 80psi and the first picture was a miss and it hit the ground then rebounded into the sign.

the second picture is on the full.

the shots were done from 25m or so

The metal was pretty thick, steel and was double layered so itl take more than 80psi to go through.
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Unread postAuthor: JDP12 » Mon May 12, 2008 11:58 am

wow nice damage to that sign there!
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"Some say his pet elephant is pink, and that he has no understanding of "PG rated forum". All we know is, he's called JSR. "
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Unread postAuthor: watto » Mon May 12, 2008 11:58 am

you've won this round sign...but we'll be back...with higher pressures and bigger, heavier projectiles...and carls LRP gun, with lead ammo...just you wait...

Notice the flash...the pics were done at 12am, I was tripping balls so carl drove with his newly aquired drivers licence...probably a good move

That was some strong fukn steel...

\/\/ IS FOR WATTO!
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notice the golf ball dimples
Last edited by watto on Mon May 12, 2008 1:06 pm, edited 1 time in total.
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Unread postAuthor: THUNDERLORD » Mon May 12, 2008 12:59 pm

That second damage pic is hillarious!!! Because what the sign reads.
Nice videos too. Well be careful tr... ...lls It's fun to be young 8)
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Unread postAuthor: watto » Mon May 12, 2008 1:04 pm

THUNDERLORD wrote:That second damage pic is hillarious!!! Because what the sign reads.


Yeh thats the first thing I said to Carl when he sent me the pics :lol: "respect of self and concern for others" hehe, It didnt say anything about concern for other peoples signs did it?

THUNDERLORD wrote:Nice videos too. Well be careful tr... ...lls It's fun to be young 8)


Well I did turn 20 last week is that still young?
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Unread postAuthor: watto » Thu May 15, 2008 7:02 am

This is what happened to the ball on a stake when it hit the TV's Glass, the glass on the TV looked to be like 1cm thick! Check the new videos at the start 8)
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Unread postAuthor: camdaman38 » Thu May 15, 2008 8:51 am

Very nice damage to that Tele Watto and yes cant wait to see more damage to that sign but i doubt the school's cleaners are going to be happy.

Great work on those milk bottles got throw 3 bottles and dented second last one but owell still made it throw 3.

Good work mate.

Cameron
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Unread postAuthor: bigbob12345 » Thu May 15, 2008 9:40 am

Nice vids
It may be just me but in the vids the silencer seems to have no noticable impact on the sound. Im probably wrong and its just my ears...
And you use a bike pump right?
If so how do you get the piston to seal because whenever I just pump into my 2in piston cannon the piston doesnt seal, it just leaks out of the barrel before any pressure can build up.
I have to use a secondary chamber to seal it which is quite annoying.
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Unread postAuthor: watto » Thu May 15, 2008 9:51 am

Trust me the silencer makes a huge difference, without the silencer it hurts your ears, with it on all you can hear is the golf ball cutting through the air.

The reason your piston doesnt seal with a bike pump is because it's too loose or doesnt have enough lube, If I blow into my blowgun I can seal the piston with just my breath, then when I stop blowing it pilots and can shoot tissues. Pistons that are only just big enough to cover the barrel, seal at low pressure very easily ive found, because there is so much more pressure pushing the piston from behind, as the barrel covers so much of the front of it.
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