[Robotgroup] Ponginator Results #4

[Eric Lundquist]

I don't know what diameter tube you are using but how about a toilet tank
flapper?  Should be relatively easy to rig a handle/chain arrangement as a
trigger.
- Eric


On 10/2/07, Ed Xavier Gonzalez <ohlaser at swbell.net> wrote:
>
> Okay, with a shopvac-styled blower, just lots larger (about 500cfm), I was
> able to reliably shoot a 38mm ball twenty yards  (the darn ball is so
> light, it won't go any further).
>
> BUT, a quirk related to how the air flows around the ball dictates the
> tube
> be blocked until the ball is let go, something akin to a gate
> valve.  During the tests, the ball squeals like mad up until the tube is
> blocked (because the ball is vibrating like mad as the air flows around it
> within the tube), but the moment the end of the tube is allowed to flow
> after the vibrations stop, ZING, the ball shoots out.  It looks neat!
>
> Sooooo . . . how to build/construct a gate valve before or after the
> ball?  Hmmmmmmmmmmmmm . . .
>
> Ideas?
>
> Or should we stay with a compressed air styled cannon?
>
> Right now, time is a friend to no-one, so unless somebody else can get
> another idea running and prove it works, I'm going to continue with what
> I've got.
>
> Build it and they will ZING.
>
> <We all have the same 24 hours.  How we use them is up to us.>
>
> Ed Xavier Gonzalez
> Oak Hill Laser
> ohlaser at swbell.net
> (512) 288-5243
>
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