In article
,
Jim Wilkins wrote:

On Aug 18, 3:54*pm, nick hull wrote:
In article ,
*nick hull wrote:





In article ,
*Don Foreman wrote:

On Mon, 18 Aug 2008 05:58:03 -0500, nick hull wrote:

The one part I lack is a floating ball, larger than 3² and smaller than
5².

One possibility:

http://www.gazingballoutlet.com/Stai...eel-Balls/30-1

Styrofoam balls are readily avaliable, but I think they'd need to be
coated with something for use as a floating plug.

Best suggestion yet and it floats; now I have to calculate how high it
floats

I calculate the density at .87, meaning it barely floats. *I'd like to
get a density .5 or lower, meaning it strongly floats.

Why does it have to be a sphere? Wouldn't a hemisphere or cone on a
cylindrical float work, perhaps a section of smaller pipe with rounded
end caps, or a plugged conical reducer? A longer float would have more
buoyancy to seal the valve opening.

A sphere rolls better and jams less. It would be simpler if it were
just a 3" pipe. but I am flanging it up to 6" to increase the volume and
I don't want an odd shaped float to hang up on the transition. Other
than that, I've been looking at a 2-liter soda bottle thta might work id
properly ballasted. I think a sphere is more foolproof if I can find
one cheap and easy.

Free men own guns - www(dot)geocities(dot)com/CapitolHill/5357/
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