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Adding heat sources may be an asymptotic solution, if the heat is  
allowed to dissipate widely.  A chimney would channel heat and, I  
gather, the right design could generate more updraft, as well as  
insulate dangerous heat from users.

Assuming your balloon has a hole on the top, making that hole smaller  
(unfortunately not quite as easy as making a hole larger...) might  
have an effect, too.



JasonJayStevens
[log in to unmask]
www.potterbelmar.org/spoke

On Jan 3, 2006, at 10:14 AM, jeff courtman wrote:

> ISEN-ASTC-L is a service of the Association of Science-Technology  
> Centers
> Incorporated, a worldwide network of science museums and related  
> institutions.
> ********************************************************************** 
> *******
>
> I'm hoping someone can save me a little time....
>
> We've recently had problems with our hot air balloon - the original  
> electric
> burners have been replaced over the last couple of years - one by  
> one - and
> there is no one here who remembers what size they were or make....
>
> our balloon was very slow (using three 750 degree heaters).   
> Replaced with
> three 1000 deg. guns, standard heat guns from grainers, but still  
> takes way
> too long to heat.
>
> any solutions?  our balloon is approx. 3.5 diameter.
>
> thanks
>
> Jeff Courtman
> Exhibits & Special Projects Coordinator
> 251.208.6851
> Exploreum Science Center
> www.exploreum.net <http://www.exploreum.net/>
>
>
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