Distance from same SE corner of G1 to G3 SE corner (a line which is very close to also touching G2 SE corner on its way to G3 SE corner) is 1774.90102438558 RC. 1/2 the straight line distance from an earth pole to its equator (not a curved line on the earth's surface) = 1772.41261253013 British inches. The inch would have to be 0.998598 inches for it to be accurate. A foot would have to be 11.983176 inches.
So we have here evidence that the British inch is related to the RC in some way.
Edited by GS1, 25 September 2012 - 12:45 PM.