A contra-bevel driven control mechanism repositions a control surface in a
fluid environment such as an aerodynamic or hydrodynamic environment.
This involves mechanically coupling an airfoil and a control surface. The
control surface may pivot about a spanwise axis between upwardly
deflected and downwardly deflected positions. A forward beveled rotor
mounted to the airfoil and an aft beveled rotor mounted to the control
surface counter rotate. The forward beveled rotor rotates about a forward
chordwise axis within the airfoil while the aft beveled rotor rotates
about an aft chordwise axis within the control surface. The angular
rotation between the forward beveled rotor and the aft beveled rotor
deflects the aft beveled rotor and the aft chordwise axis within the
control surface. Additionally, this method allows the control surface to
be deflected with maximum mechanical advantage when the control surface
is fully deflected.