(08-11-2009, 10:29 PM)pat slinn Wrote: An interesting theory Marco............ Does anybody know when the TT mountain circuit was last officialy measured by the IOM goverments surveyors dep't ?. I remember that in the late 50's, perhaps very early 60's the course was measured by MCN, I cant remember the outcome, perhaps somebody can, or they have a copy of the edition of MCN that ran that story.

Pat.

Hi Pat, thanks for the reply. On the summer 2005 issue of the TTSC magazine there is an interesting article about that subject. In 1954 the "Motor Cycle" magazine did two experiments:
1. the lenght of the TT course was measured on a "middle-of-the-track" basis. Result: 37.588 miles.
2. the lenght of the TT course was measured on a "racing line" basis, thanks to the help of the great Fergus Anderson. Result: 37.499 miles.

But of course this is not the answer to my question.