Wallace Berry wrote:

Oh, one other thing - Frank, tell me again what the heck winglets are
supposed to do for an LS-4 (besides look cool?)

Well, they are supposed to improve low-speed handling and thermalling
performance by reducing induced drag, while not costing anything at the
high end of the speed range. I think they actually do improve
performance as advertised, but I don't have any hard data to support
this, other than the wind tunnel & flight data obtained in by the folks
who adapted the LS-8 winglets to the LS-4.

But hey, they *do* look cool! ;-).

Frank(X3)