[TheForge] How to melt steel with sunlight:

[peter fels & phoebe palmer]

Sounds even better.
But we are talking about a pretty big fresnel lens then ...though i 
suppose a bunch of them could be used in a grid, given a bulge to mount 
them on.
Those cheap dimestore mirror strips designed to fit on a wardrobe door,
have the interesting property of bending into a mild arc,i 
found....which could be used as a focusing mechanism.
Tempered glass will bend even further.


On 11/27/2010 6:01 AM, Andrew Vida wrote:
>
> peter fels&  phoebe palmer wrote:
>> Thanks Bruce;
>> That's delightful!
>> Brings me back to my old proposed solar forge
>> If one were to use an array of cheap mirrors with tracker/step motor
>> rigs like Kurt's,
>> combined with a big lens...say a pool of water in a plastic sheet hung
>> from a frame.....
> 	Too much fuss.  Fresnel lenses can be made arbitrarily large yet remain
> very light in weight.
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