Re: FW: Armadillo 4/18

Jake Anderson wrote:

>It takes much higher actuator forces if the vanes are hinged at the
>top.  For supersonic flows, the center of pressure is in the middle of the
>plate.
>
Still, by pivoting it only slightly above the center of pressure you can
arrange for the actuator forces to be reasonable, whilst allowing
neutralisation if the power fails.

>  "Stability" doesn't really help anything with a computer controlled
>vane, because it is constantly adjusting anyway.
>  
>
Not entirely, you wouldn't want to pivot it below the center of pressure.