Re: [Phys-l] Rubens Tube

[Bernard Cleyet <bernardcleyet@redshift.com>]

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
>