Is it possible to build a Fresnel lense with an diameter of 50 - 60 metres, maybe assembled in a frame/patchwork style construction? Maybe somebody already did this - are there any references?
Good day everyone. Would anyone know of a mill or distributor who handles STOCK sizes of oval or obround carbon steel (1020/1026) tubing. Let me eliminate 90% of your responses before-hand by saying that a custom run is out of the question, I only need a couple 100 feet of two sizes. Thanks...
