Originally Posted by
Turbavykas
Hi,
I saw in multiple places at FCOM that roll rates are increased while using speed brakes. Can anybody explain why it is so aerodynamically?
I believe that your increased roll rate is when you have partial speed brake extension, not full.
For a given amount of normal aileron deflection, there is a greater displacement difference between the roll spoilers at half speedbrake deployment than when at full speedbrake or no speedbrake..