9:54 to be precise. Which is why, as you so ably demonstrated, the whizz-wheel with its analogue scales is so useful and simple for pre-flight planning!
Using MDR, all those 'factors' and inverse 60 times table seems much, much more difficult, error prone and of somewhat nugatory efort. Moreover, errors introduced by MDR pre-flight planning for ETAs mean that it may well be not just the wind which may have caused a time error at the 1/3 leg point, so proportional timing correctio is not valid.
But MDR is fine, absolutely fine, for unplanned diversion work.
Last edited by BEagle; 10th July 2004 at 19:28.