Convertable lifting propeller for unmanned aerial vehicle

A propeller comprising:

• a hub;
• a first blade extending in a first direction from the hub;
• and
• a second adjustable blade extending in a second direction from the hub, where the second adjustable blade is rotatable between a first position and a second position;
• wherein:
• a leading edge of the first blade and a leading edge of the second adjustable blade are aligned in a direction of rotation of the propeller when the propeller is in an operational configuration;
• and
• the leading edge of the first blade and the leading edge of the second adjustable blade are aligned in a direction of transit flight of an aerial vehicle when the propeller is in a transit configuration.

A method to operate an aerial vehicle, the method comprising:

• rotating with a lifting motor a lifting propeller to generate a first positive lifting force to cause the aerial vehicle to perform a vertical flight;
• rotating with a thrusting motor a thrusting propeller to generate a thrusting force to cause the aerial vehicle to perform a transit flight;
• terminating a rotation of the first lifting propeller during the transit flight;
• rotating a first blade of the lifting propeller such that a leading edge of the first blade and a leading edge of a second blade of the lifting propeller are both aligned toward a direction of the transit flight;
• affixing the lifting propeller such that:
• a second positive lifting force is generated by the first blade in response to airflow passing the first blade during the transit flight;
• and
• a third positive lifting force is generated by the second blade in response to airflow passing the second blade during the transit flight.