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Subject:
Re: fans and sand for sandscape
From:
Jeff Courtman <[log in to unmask]>
Reply To:
Informal Science Education Network <[log in to unmask]>
Date:
Wed, 23 Nov 2011 10:30:48 -0600
Content-Type:
text/plain
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ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related institutions.
*****************************************************************************

Hey Kim:

Without knowing the specs, its hard to say.  If you haven't already, I  
would search use the search term "totally enclosed, fan cooled" motor  
(TEFC).  For instance, this is what is on our shop table saw and it  
prevents sawdust from getting into the motor and windings.  You still  
have the issue of what the sand is going to do to fan blades, the  
cooling fan blades, and the drive shaft, but that is a different  
matter :).  I would consider a good motor, then when it wears out,  
have it rebuilt - it is often way cheaper than a newer one (again,  
depends on the size).  If this is a copy from the Exporatorium of Ned  
Kahn's piece?  I would imagine those folks have looked at the issue  
and you might want to contact them...


On Nov 23, 2011, at 9:54 AM, Kim Hunter wrote:

> ISEN-ASTC-L is a service of the Association of Science-Technology  
> Centers
> Incorporated, a worldwide network of science museums and related  
> institutions.
> *****************************************************************************
>
>
>
> We have an exhibit that uses a 24 volt fan to blow sandblasting sand
> into dunes, channels, and other landforms.  The fan is housed within  
> the
> sandscape itself, and over time, the fan becomes gunked with the
> sandblasting sand (which is actually a fine-grained glass) and burns
> out.  Does anyone know of a fan that would achieve the same results  
> but
> not burn out, or does anyone know of a sand that behaves as nicely as
> the sandblasting sand but wont gunk up the fan?
>
> --Kim
>
>
>
> Kim Hunter
>
> Senior Director, Exhibit Development
>
> Orlando Science Center
>
> 407/514-2061
>
> [log in to unmask]
>
>
>
> Inspire Science Learning for Life
>
>
>
>
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> For information about the Association of Science-Technology Centers  
> and the Informal Science Education Network please visit www.astc.org.
>
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For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org.

Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org.

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