On Thursday, April 30, 2015 at 4:15:06 PM UTC-4, Don Johnstone wrote:

....snip...
Attempting to control an aircraft from outside,
against the will of the pilot is nothing short of crazy but each to his own
I suppose.
....snip...

My joking comment (about running out of rudder) at the beginning of the thread aside, you seem to have picked up an incorrect idea about how this SIGNAL is supposed to work.

The glider pilot will position themselves just outside of the tow plane's wingtip. Just about where you would box the wake. Then the tow plane's pilot is supposed to notice this and turn in the direction away from the glider.. When the glider moves back to center, then the tow plane straightens out..

It is not "against the will of the pilot" it is communication, without the radio.

Todd Smith
3S