" Blueskies" wrote in message
m...

"Mike Rapoport" wrote in message
hlink.net...

" Blueskies" wrote in message
m...

"Matt Whiting" wrote in message
...
Mike Rapoport wrote:

Spoilers function the same as ailerons at low angles of attack and
better than ailerons at high angle of attack. The primary advantage of
spoilers instead of ailerons is that it enables full span flaps.
Spoilers also reduce or eliminate adverse yaw.

I assume there must be some disadvantages of spoilers for roll control
as you see them so rarely. What are the drawbacks? Cost??

Matt


What happens when the wing is inverted? If you are pushing negative Gs
then the roll control will be reversed?


It would work the same. The wing doesn't know that it is inverted, all
it knows is AOA.

Mike
MU-2


The wing does know, the AOA is negative. Right side up, the spoiler is
deflected and the wing drops. Turn it upside down and deflect it, the wing
still drops.

No. The wing is pushing the air down to keep the plane up. If the spoiler
is extended on an inverted wing, turbulence is created behind the spoiler
and air is not pushed down as effectively. Although I have never flown
inverted, I have pushed the nose over to the point of negative Gs and roll
control is not reversed.

Mike
MU-2