Should the question ever arise again I’ve found this Aircraft Turn Information Calculator link:

http://www.csgnetwork.com/aircraftturninfocalc.html

Brian

Apologies Paul, Mk III.

Brian

Thank you Oracal; unfortunately  I don’t have a maths degree (or any other degree come to that) and the only thing I know for certain is there was no significant wind  (slack area of high pressure).  Other than that I’d guesstimate 170-180 mph before the turn started.

You could try PMing Jamesm, bobkat, either by going back to page 13 or trying  https://www.key.aero/private_message/create?recipient=48717

Oh, come on lads; I think everyone posting on this thread has been subscriber for 10-12 years or more, so which means, in the eyes of the bright young programmers, that we are old fossil who are blind to the benefits of change.   

‘Not so you youngsters,  as an old fogey I think I’m safe in advising you change has to work  – and yours patently doesn’t.  This has been going on for nearly three months and we’ve yet to see any significant change which makes people want to use the forum, very much the opposite in fact.