Hey, take care there because practical has no place or meaning in some minds. lol
The Natural Philosopher wrote
> > Wow. How does it know which way the wind is blowing? I think you must
> > patent that immediately. No other aircaft knows which way the wind is
> > blwoing apart from looking at the ground...
> >
> > what if the wind is going crosswise over the runway?
> >
> >
> > Then it will have to and like evrey other plane in a crosswind. Using > > some rudder.
>
> I think Mr. Gennaro was referring to the ground handling
> of a rudderless powered parachute. Anyway, your response was unjust.
> The weathervaning tendency -yaw stability- is the reaction
> of the longitudinal axis in the yaw direction to the relative wind.
> Everything you do in an aircraft is in relationship to the ground.
> And the wind. I suggest that the aircraft always knows from which
> way the wind blows. Please don't introduce that "moving body,
> free from earth, in a moving volume of air" argument.
> It's not practical.
> Podo