"arcwi" wrote in message
...
Yes, but the common logic suggest that you also spend less time in
tailwind
that in head wind

Yes.

- and if there is no wind the two should cancell each
other...

No. Nothing makes them differ by equal amounts.

Consider the case when the headwind is equal to the TAS. Then it takes
*forever* to get to B.

Or consider a headwind that's just one knot less than the TAS. You
eventually get to B, but it takes an enormous amount of time. Even if the
trip back to A were instantaneous (which it isn't), it still couldn't cancel
out the extra time it took to get to B.

--Gary

Or should they...

"Stefan" wrote in message
...
arcwi wrote:

Can someone explain the difference?

You spend more time in headwind than in tailwind.

Stefan