On Mar 6, 10:12*pm, Bret wrote:
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?

I agree with Wayne's reply.

I can understand the simplicity: No spoilers/air-brakes to build into
the wing. No internal linkage to build into the wing (just control
the flaperons at the root). But I think your concern about roll
control is valid. I once built an R/C model with the setup you
describe. Landing was very tricky, too tricky, especially with any
crosswind.

Regards,

-Doug