Polar with spoilers extended?

There are other big heavier gliders with lots of inertia, and they react
very well and immediately to the deployment of airbreaks.
Those on the original DuoDiscus are just a very bad design. But, as Marc
pointed out, a sideslip works well AND gets you a visual on the airfield
from the back seat (the second very bad design glitch of the Duo).

Bert

"Bill Daniels" bildan@comcast-dot-net wrote in message I think the Duo's
airbrakes are better than many people think. The Duo is a
big heavy glider with lots of inertia. It doesn't like to change
direction quickly. That includes its behavior on sudden airbrake
deployment. You don't get a lot of sink right away.

My first reaction was that the airbrakes were weak but a little more
experience showed me that with a little patience, the brakes took effect
and produced a respectable decent rate. The Duo just makes you plan ahead
a little more than with a light single seater.

Bill Daniels