I toke a small radius just to show, how tigth the turn must be to get about
5-10 degree angle for thread. With a 60 m radius, the angle of thread is
about 1.7 degrees, if it shows the true slipping angle of the position,
where the thread is located.

Added the asymmetric force of the air to the another side of the glider
while slipping, I doubt if there is any even small advantage to do it. It
coud be vice versa, so that there is some advantage to do skidding, because
then the air forces the glider a bit towards the core.

In either case the effect seems to be very small and question looks like
quite academic. Those opposite vectors might even summarize to absolute zero
anywhere bethween this very small angle...?

js


"Dick Johnson" wrote in message
om...
"JS" wrote in message
...
Measured with a cad-program, for a turn radius of 30 m, the thread angle
should be 3.6 degrees, if the distance of the thread from cg is 2 m.
Tighter
turn, wider angle. How precisely you can keep your thread in a 3-4
degree
angle?

js

Hello JS -You must be flying a hang glider to be capable of turning a 30
meter radius while thermalling. For a given bank angle, the theoretical turn
radius is proportional to the square of the flight velocity. Right?
My unballasted Ventus requires about 48 kts of airspeed when
performing a 45 degree banked thermalling turn. Under those conditions
I calculate my turn radius to be about 204 ft, or 62 meters.
Dick Johnsonto