Thanks, Bill. I should have something close to that.
10mm?
You forget, here in the good ole US of A, we still use units of length based on the length of a Roman soldiers foot and three barley grains end-to-end.
From Wiki:
http://en.wikipedia.org/wiki/InchQuote:
An Anglo-Saxon unit of length was the barleycorn. After 1066, 1 inch was equal to 3 barleycorn, which continued to be its legal definition for several centuries, with the barleycorn being the base unit.[2] One of the earliest such definitions is that of 1324, where the legal definition of the inch was set out in a statute of Edward II of England, defining it as "three grains of barley, dry and round, placed end to end, lengthwise".[
Guess I'd better measure the distance traversed in vacuum by light
in 1/299792458 of a second and divide that by Raputtak's constant