This is a drawing that shows the necessary parts of the mechanical mathematician for making large parabolic solar reflectors. Using it to guide you, you can make parabolic dishes with cardboard, cob, hardiplank or other material.
Bio:I am a stone mason. My hobby is making new solar cooking and gardening stuff. I have used solar heat to cook soil for a couple of years. In mother earth news in January, i read that their compost expe...read more »