Wayne Paul wrote:
Bert,

All the sailplanes, I am aware of, that use flaps for glide-slope control also have ailerons. (PIK-20B, 1-35, Concept 20, the entire Schreder series, etc.) None of the mentioned models' wing control surfaces are full-span flaperons.

Wayne
http://www.soaridaho.com/Schreder


"Bret" wrote in message ...
Hi, do any gliders have full-span flaperons that also act as airbrakes
(say at 70-90 degree), or do you lose all aileron authority when the
flaperons are that deflected?


Kestrel 19m (Slingsby T59D) has full span flaperons with the same mixer
capability of the ASW20 - the correct procedure is to put the flaps into
negative territory, then apply the landing flap lever. That way you have
wonderful roll authority, ailerons slightly drooped and ~35 degrees of
landing flap.

Flaps and ailerons are separate - The mixer applies proportional flap
deflection to the ailerons - so - If you do it wrong the ailerons go to
almost full down deflection and you only (effectively) have upward
movement on one to cause roll. Makes turns onto finals interesting with
those long heavy wings.

I don't know of any sailplane design that uses full span single surface
flaperons.

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