Originally Posted by
stiknruda
Wind down - 'cos that really shows the true vector diagram
I don't get this one. The triangle of vectors is obviously the same in both cases; the only difference between -up and -down is which vector you line up with the wheel's centre line.
Horses for courses, really.
Yes and no: the problem is one and there is only one solution, no matter which method you use. If you get different results, most likely it's because the wind-down has not been iterated to a sufficient precision (or precision has been lost from step to step). True, if an exercise has been prepared using the wind-down, then by applying the same method (with same iteration errors) you are more likely to get the correct answer (which is a reason good enough to use the wind-down, in this case!)
Deeday