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Subject:
Re: Need a more robust hand crank generator
From:
Erich Rose <[log in to unmask]>
Reply To:
Informal Science Education Network <[log in to unmask]>
Date:
Sat, 9 Mar 2013 07:35:33 -0600
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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.
*****************************************************************************

Dan, 

What broke? The handle or the actual generator? My experience is that the handles fail long before the generator. Creating a custom crank from sturdier materials would be my suggestion. 

Sent from my iPhone

On Mar 8, 2013, at 9:32 PM, Dan Zevin <[log in to unmask]> wrote:

> ISEN-ASTC-L is a service of the Association of Science-Technology Centers
> Incorporated, a worldwide network of science museums and related institutions.
> *****************************************************************************
> 
> Greetings,
> 
> We're looking for a robust yet small, lightweight hand crank generator that can withstand a lot of use by teenagers.  This one gave us about 20 hours of use before the small handle snapped off: http://www.k-tor.com/hand-crank-generator/   
> 
> The crank needs to output at least 10W of power.  
> 
> If you've got suggestions for something better, we'd love to know about them!
> 
> Thanks,
> 
> Dan
> 
> ****************************
> Dan Zevin 
> Public Education Specialist
> Space Sciences Laboratory
> 7 Gauss Way, MC 7450
> University of California, Berkeley
> Berkeley, CA 94720-7450 
> 
> (510) 642-8326 
> (510) 643-5660 [fax] 
> [log in to unmask]
> http://cse.ssl.berkeley.edu
> ****************************
> 
> AST:7731^29u18e3
> 
> ***********************************************************************
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> 
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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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