On May 16, 2:10*am, GC wrote:
Also, with great respect to Bob K and his experience, I'm not convinced
airflow will sufficiently straighten a rudder with a broken cable. *Even
in the best case there will be residual deflection where the airflow
balances the other spring. *This could be quite large.

Isn't that something that can be easily (and safely) verified? In many
gliders, rudder cables are accessible in the cockpit. Take a high tow,
grab one cable and pull it. This simulates broken spring or broken
cable on one side. If the glider becomes uncontrollable, just release
the cable.

Bart