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nice instructable! using this for the mirror on a solar cooker.
Thanks
Yea, of course there's an exception for elected officials and those who seek public service to pollute, but you can go shopping with a clear conscious. after the election law deadline.
I've used this stuff to hold the insulation away from the under eves vents in my attic.
Here's another use:
http://www.iamanangelchaser.com/products/street_spam_lounger/street_spam_lounger.html
http://www.irfanview.com/
Irfanview has a Paint plug in so it's very easy to cut, paste and print sections of that paraboloid.
http://home.arcor.de/ernst.willand/amsi-model.html
is how I figure the curve for my trough collectors. Carefully constructed these will turn water to steam in a pipe quickly...so I use engine oil. Build a small trough and heat water quickly.
Thanks to Homohabilis for starting this thread.
http://www.instructables.com/id/A_Strong_Simple_Sun_Tracker/?ALLSTEPS
Enjoy
Hopefully I'll post my replica before September :)