Marc Ramsey wrote:
My opinion is the opposite, Duo spoilers likely do an adequate of
spoiling lift, what they don't do is produce much drag.

The irony is wonderful: pilots are ocasionally chastised for saying
"spoilers" when what they "really mean" is (Schmepp-Hirth) airbrakes.
And now we have a Schmepp-Hirth glider equipped with those airbrakes
that really deserve to be called "spoilers"!

--
Eric Greenwell - Washington State, USA
* Change "netto" to "net" to email me directly
* "Transponders in Sailplanes" http://tinyurl.com/y739x4
* "A Guide to Self-launching Sailplane Operation" at www.motorglider.org