Robin Heath and a man named Richard Bartosz use 283.60 in their calcs and it works very well but Thom would not use the MOD value in his book unless he was ok with it. 283.60 is the centre to centre of the Aubrey holes so you can see why Thom went with it as the diameter is 2 and radius 1 and Jacob has identified just how important this is as the starting point. It just happens to be one imperial foot on the radius from 285.60 to 283.60 diameter.
Robin Heath uses 2.722 for the megaltjic yard but Thom gives 2.72. Heath is not using the megalithic yard he is using a derivative that is not base 17. It works fine within his calculations.
just like at the GP 12 inches has been identified by the builders.
Try the aubrey circle test
897.60 / 2.722 = 329.7575312 not a irrational number so ok but look at the equivalent calculation using Thom's MY
897.60 / 2.72 = 330 feet in inches 3960. This is a metrologists dream, ask Jim, it is the Saxon yard as it was in megalithic times. Exactly the same.
If the French had made the centimetre 2.5 x 100/99 instead od 2.540000and a bit they would have a perfect metre.
2.5 x 100/99 x 39.60 = 100.
Edited 2 time(s). Last edit at 22-Jan-18 12:40 by DavidK.