> Where should the rudder control go ?

Left stick, left/right throw...

>As I've understood from some messages on RCSE and also in articles, the
>primary turning-control should be on the right hand, with the elevator, and
>that's what I'm used to do. I'm used to fly in mode II.

This is correct, ailerons/elevator on right stick, rudder/speed control
on left stick.

>I've just read some articles about cross-wind landings and correcting high
>wingtip attitude with the rudder, NOT with the ailerons, to avoid throwing
>the lower wing in a deep stall.

To prevent stalls in adverse conditions, you need to land at a higher
airspeed, at least enough airspeed to maintain control authority.
You literally need to fly the model into the ground, not a nose
plant, just a tad nose down to keep up airspeed, flaring can
be dangerous in rough conditions.

On models with very little dihedral (yaw to roll coupling) rudder
doesn't do much to level out the wings.

At a local slope site, we have to land on a single lane path that
runs ridgewise (cross wind landings). On medium to strong days, the
method is to setup approach about 100 feet below the ridge, 
using airbrakes or cross controlling to prevent getting too high
or too fast while approaching the ridge. Just as the model clears
the ridge, right aileron/right rudder is used to line up with path
and right aileron is used to prevent the model from being rolled
over upside down by the crosswind/updraft/rotor. The rudder is
used to crudely steer the model, and the nose is kept down enough
to force the glider down onto the path. (The path is a bit uphill,
which helps). The key here is that you can't let the right wing
get above horizontal without risking a roll over.



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