Abstract: A propeller for an aircraft includes at least two blades, arranged about a central hub, which is coupled to at least one motor, driven by a power source. At least one blade is attached to at least one sleeve member, configured for being in an outer sliding connection to a first cylindrical element of the hub. An inner surface of each of the at least one sleeve member includes at least one projecting element, configured to be in a sliding connection with a corresponding at least one first recessed guide path, arranged in an outer surface of the first cylindrical element. Each of the at least one first recessed guide path circles at least partly around the first cylindrical element from a first position to a second position. Each of the at least one sleeve member positions its blade in an operational position when its, at least one, projecting element is positioned in its corresponding first position in its designated first recessed guide path of the first cylindrical element.

Abstract: A propeller for an aircraft includes at least two blades, arranged about a central hub, which is coupled to at least one motor, driven by a power source. At least one blade is attached to at least one sleeve member, configured for being in an outer sliding connection to a first cylindrical element of the hub. An inner surface of each of the at least one sleeve member includes at least one projecting element, configured to be in a sliding connection with a corresponding at least one first recessed guide path, arranged in an outer surface of the first cylindrical element. Each of the at least one first recessed guide path circles at least partly around the first cylindrical element from a first position to a second position. Each of the at least one sleeve member positions its blade in an operational position when its, at least one, projecting element is positioned in its corresponding first position in its designated first recessed guide path of the first cylindrical element.