On Sat, 10 Feb 2018 22:44:03 +0000, Howard Banks
wrote:

Wing warping -- end of those gaps -- if nobody has said it already.



The Open class Jantar 2 in the late 70's had a version of this, with
camber changing flaps that have no hinge. The deflection is controlled
by deflection of the continuous upper wing surface...no upper surface
gaps.

Bob