Quick and dirty parabolic dish solar concentrator design!
Basically I want to go to the store, buy an 8 by 4 corugated plastic sheet, cut it in petals, stick aluminum kitchen foil to it (as few wrinkles as possible) and have as rigid a parabolic HALF dish as possible. Then I mount it in my equatorial mount frame and test it.
It gets a bit harder because the dish is not exactly a half. Some extends a bit past the center of the dish.
Here are some of the issues and choices. Do you cut along the corrugations or across them?
Do you do petals radiating out from the center or is it better to do the thing with cones? Like in the picture in the link
Cones might have a problem due to the corrugations not being in line with the shape that I make. so it might warp in strange ways.
Is there an alternative to the corrugated sign plastic sheet?
BUT they might work because I can guesstimate a not perfectly round dish more easily than with petals..
I think that something with a focus about 6 inches wide would be sufficient for me.
It has to be rigid and light as can be too. What can I use as umbrella splines to make it keep its shape?
Thoughts and suggestions would be greatly appreciated. I might have a day off tomorrow so get those suggestions in quick as you can!