" wrote in message
ups.com...
Since sailplanes overbank in steep turns applying the required opposite
aileron would then create even more adverse yaw.

One reason that the Carbon Dragon has full-span flaperons is that they
are driven from the root end only, avoiding the need to clutter the
wing structure with pushrods, cables, pulleys, etc.

Jonathan Pitt



Full span aileron will reduce the deflection to nearly half for any given
roll rate, which reduces deflection drag. With a one stage differential
input the control performance becomes even more advantages.
Naturally it also has disadvantages. An example of that arrangement is the
DG 800 series of gliders. It has less to do with clutter.
The best compromise in my opinion is the ASW 20 and 27 arrangement.
Regards
Udo