Hybrid Car – More Fun with Less Gas

Re: Vs: How to produce cheap mirrors? - Page 4

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Posted by Paul on September 5, 2005, 9:39 pm
www.Solarcooking.org is a good site.
I particularly like the Fresnel parabolic.

Posted by Dan Bloomquist on April 1, 2005, 7:24 am

Morris Dovey wrote:

Great in the summer. Wood is what counts through the seasons.

Consider what the primary fuel of India is....

Best, Dan.

Posted by John W. Hall on March 30, 2005, 4:14 pm
 On Tue, 29 Mar 2005 19:39:31 -0800, "Brian Sanderson"

OT: Reminds me of an interesting store window display I saw in Milano
years ago - a drum with aluminised Mylar sheet. On the back, a small
motor driving a crank at about 1 rev per 3 seconds. Crank driving a
simple bellows connected to drum. Result: a large zoom mirror,
continually zooming and moozing.

Cochrane, Alberta, Canada.
"Helping People Prosper in the Information Age"

Posted by G. R. L. Cowan on March 30, 2005, 5:58 pm
 Brian Sanderson wrote:

At http://engnet.anu.edu.au/DEpeople/Keith.Lovegrove/STG/basics.html  a
long article about solar concentrators. It is illustrated with photos
of real hardware, including stretched-film mirrors, but says,

   The membranes were made from aluminized acrylic film.
   Unfortunately this film proved not to be very durable,
   which was a major factor in the plant ceasing operation in 1990.

--- Graham Cowan, former hydrogen fan
http://www.eagle.ca/~gcowan/Paper_for_11th_CHC.html  --
boron: how individual mobility gains nuclear cachet

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