BingoBoy
I have never seen a microlight pilot use a whizz wheel and they have the same exams, flight planning is possibly more important when one's cruise is even more effected by wind etc.
Not quite, we don't have to use the whizz wheel instead being taught to plot out triangle of velocities for the microlight nav exam.
Personally speaking, I read a few books about flying where the whizz wheel is mentioned for doing really useful snap calculations in the cockpit. You mention the wind calculation & I could have done with that on my GST for example. I don't have a whizz wheel for the reason mentioned above, but have it on my todo list to see if it really is useful as a quick calculator that doesn't need batteries but helps with general flying.