I'll come out with it. I'm pro-flat earth. However I would like to know how the round-earthers explain the manufacture of industrial flat glass, using the float process?
http://www.britglass.org.uk/Files/form2Float_Process.pdfLet me draw your attention to page 5, Stage 5 Inspection.
"The float process is renowned for making perfectly flat, flaw-free glass"
If the earth is round, how do you make a perfectly flat flaw-free piece of glass using a "mirror-like surface of molten tin" , especially when "A float line can be nearly half a kilometre long.". Surely a round earth would put a curve in the glass and it would not be "Perfectly flat, flaw-free glass".
Look at the lengths these guys go to to get flat glass. 100 million inspection measurements a second! Surely they would work out all their glass curved? Unless the earth was flat of course.
Some quick maths ...
1 mile = 1.609344 km
Suppose that the earth is a sphere of radius 3963 miles as claimed. If you are at a point P on the earth's surface and move tangent to the surface a distance of 1 mile then you can form a right angled triangel as in the diagram. Using the theorem of Pythagoras a2 = 39632 + 12 = 15705370 and thus a = 3963.000126 miles. Thus your position is 3963.000126 - 3963 = 0.000126 miles above the surface of the earth. 0.000126 miles = 12*5280*0.000126 = 7.98 inches. Hence the earth's surface curves at approximately 8 inches per mile.
In summation, their glass would bend 3 inches over the half kilometre molten bath and not be "perfectly flat, flaw-less glass".
What gives round-earthers?