Apparatus for aerial transportation of payload

A vertical take-off and landing aircraft comprising:

• a primary rotor unit having a rotor axis, an upper rotor system, and a lower rotor system, the upper rotor system comprising:
• a pair of top blades configured to rotate about the rotor axis;
• an upper rotor shaft extending along the rotor axis and configured to drive the rotation of the pair of top blades;
• an upper swashplate configured to translate along the rotor axis and not configured to tilt relative to the rotor axis, translation of the upper swashplate causing a pitch of each of the top blades to change equally;
• and
• an actuating rod extending along the rotor axis through the upper rotor shaft, translation of the actuating rod configured to control the translation of the upper swashplate;
• the lower rotor system comprising:
• a lower swashplate configured to translate along the rotor axis and not configured to tilt relative to the rotor axis;
• and
• a pair of bottom blades configured to rotate about the rotor axis, translation of the lower swashplate causing a pitch of each of the bottom blades to change equally;
• and
• a plurality of secondary rotors each comprising fixed-pitch rotor blades.