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I've been thinking of trying to build a flameless Ruben's Tube using
ping-pong balls, clear acrylic tubes that would allow the balls to 'float',
and a compressed air source. Has anyone tried this approach or does anyone
foresee any catastrophic problems with the idea?
Matt Coia
On Thu, Apr 10, 2008 at 8:51 PM, Bernard Cleyet <bernardcleyet@redshift.com>
wrote:
> If one reads the archive: I suggested PVC using stainless steel
> nipples to "isolate" the "heat". I suspect the combo of your heat
> dissipation and the SS insulation would be a permanent "fix".
> Everyone on the list nixed my idea and gave sources for metal pipe,
> or wrote nothing.
>
> bc semi-vindicated, and thinks Josh should "join" tap-l.
>
>
> On 2008, Apr 10, , at 17:12, Josh GATES wrote:
> > My PVC Ruben's tube didn't melt, because I put a 2 inch wide strip of
> > folded-over (a few times) tin foil along the axis with the holes. I
> > drilled the holes through the tin foil. It conducted the heat away
> > nicely. Occasionally I would have to redrill to clear out a few of
> > the
> > individual holes that melted a bit, but it wasn't bad. However,
> > the tube
> > will eventually bow upwards, especially if you use it for extended
> > periods. It got to the point that I couldn't use it anymore after
> > 20 uses.
> >
> > Josh Gates
> > Stoneleigh-Burnham School
> > Greenfield MA
> >
> > Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu> on
> > Thursday, April 10, 2008 at 6:45 PM -0500 wrote:
> >> And it didn't melt?
> >>
> >> bc suggest asking the tap-l people; they evidently all have one.
> >>
> >> Archive:
> >>
> >> http://lists.ncsu.edu/cgi-bin/digest?list=tap-l&archive=tap-l.
> >> 200803&Submit=Show+Archive
> >>
> >>
> >> p.s. The history and detailed construction of his* tube:
> >>
> >>
> >> http://en.wikipedia.org/wiki/Rubens'_Tube
> >>
> >>
> >>
> >>
> >>
> >> * Heinrich Rubens
> >>
>
> cut
> >
>
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> Forum for Physics Educators
> Phys-l@carnot.physics.buffalo.edu
> https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l
>
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