ADJUSTING APPARATUS FOR ADJUSTING THE PITCH ANGLE OF PROPELLER BLADES, VARIABLE-PITCH PROPELLER, CONTROL FUNCTION WHICH CAN BE IMPLEMENTED IN A COMPUTER, AND METHOD FOR ADJUSTING THE PITCH ANGLE OF PROPELLER BLADES

摘要

An adjusting apparatus (9) for adjusting the pitch angle of propeller blades (1, 2, 3, 4, 5, 6, 7, 8) of a variable-pitch propeller - in a first blade pitch-angle range with positive pitch angles at which the propeller blades (10) produce thrust, - in a second blade pitch-angle range which includes in a third blade pitch-angle range with negative pitch angles, at which the propeller blades produce reverse thrust with the propeller rotating in the same direction, wherein the pitch-angle range in which the blade drag is a minimum, as well as a range of positive pitch angles with low thrust and a range of negative pitch angles with low reverse thrust, at least a first group (A) of the propeller blades (1, 2,...) can be rotated through the second blade pitch-angle range with critical pitch angles, while the propeller blades in another group (B) are in a positive blade pitch- angle range. Corresponding variable-pitch propeller computer- implentable control function and method are also described.