"Jose" wrote in message
.. .
There is no difference.

It =seems= like there is a difference, only because the perspective of
what you want to accomplish is different. However, as far as the way the
airplane goes through the air is concerned, they are completely identical.
The only difference is the way you think of the airplanes motion with
respect to the ground.

The airplane doesn't care about the ground though.

Aha! Now I understand. Thankyou.
Oz/Crash Lander