whoswho and
DaveD, one of the fundamental skills when using the "wizz-wheel" (or any other computer for that matter) is to have some idea of the answer yourself to use as a rough check. It is as much part of the skill in evolving the answer as using the equipment itself.
In this case, it should be obvious that there will be an element of headwind component. From that, it should be equally obvious that the TAS must therefore be
greater than the G/S required. So, if you get an answer where TAS is
less than the required G/S, you will know you have made an error.
If you want to get on (and survive) in aviation, live defensively - if you don't check it, no one else will ...
JD
