I would like to know how to build a correct parabola, how to build this parabola with a focal point allowing to heat a dish.
In addition, I don't know whether a focal point far from the dish or a very close point is better.
My goal is to build a parabolic solar cooker.
Thank you for your help.
that looks interesting
Solar-thermal / solar-oven cooker-ulog-build-and-performance-t10753.html
solar-thermal / solar-cookers-solar-ovens-examples-in-self-construction-t10742.html
solar-thermal / solar-oven-dats-manufacturing-and-efficiency-t10766.html
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