WingFlaps

On Apr 25, 10:45 pm, Stefan <stefan@mus._INVALID_.ch> wrote:
> WingFlaps schrieb:
>
> > Itls a turn upwind to downwind. That involves 2 direction changes, one
> > to reverse course and the the other to line up the runway. If there's
> > wind there will be an effect on line up. Try thinking about more
> > factors that cost altitude OK?
>
> All good and fine, and I'm thinking about a lot of factors, btw. also
> about human ones which are usually the weak link, but you still have not
> explained what you meant when you wrote: "Now we add in the energy
> losses from having to accelerate with the wind."

Yes, I did. I'll explain it one last time. A direction change in a
plane is always due to acceleration (and that means more drag). That's
Newtonian physics. You go from up wind direction (takeoff is usually
up wind) to turn in the wind direction to land down wind. There's an
acceleration, it is a change in _velocity_ it creates drag, it costs
height and that's the important bit. Now do you understand -TURNS are
not free, they cost more height than the distance covered. Get it
now?

Cheers