Monster tennis ball gun

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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hoarp001
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Quick update:

I just shot an empty coke bottle, 763mph. 2mph over the speed of sound, 100psi.

Just uploading a video now il post the link when its done.
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hoarp001
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http://www.youtube.com/watch?v=qpVNyBJx94c

Video.

Note how the backstop flew backwards. If the MDF board was supported better, im pretty sure the bottle would have compleatly cleared the board.
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DYI
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With the chrony so close to the muzzle, the blast might be affecting it. Try heavier projectiles from farther away, and see if you're still getting higher readings than GGDT predicts.
Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
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THUNDERLORD
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hoarp001 wrote:http://www.youtube.com/watch?v=qpVNyBJx94c... If the MDF board was supported better, im pretty sure the bottle would have compleatly cleared the board.
One way to find out. :wink:
Pretty amazing for an empty bottle! 8)
-----SPEED,STRENGTH, AND ACCURACY.-----
"Procrastination" is five syllables for "Sloth".
Theopia 8)
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hoarp001
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Joined: Tue Jul 17, 2007 4:09 pm

Hello again,

After afew months of nothing, I took the piston out and re-greased it and cleaned it up. Turns out that a highly greased piston increases power by a good margin.

Heres a recent video:

http://uk.youtube.com/watch?v=UpHg3vmesug
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