[TheForge] How to melt steel with sunlight:

[Andrew Vida]

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.