A vertical takeoff and landing unmanned aerial vehicle, comprising: a left main wing and a right main wing ; a left front wing and a right front wing ; a main body which is engaged with the left main wing and the right main wing ; a left linear support for connecting the left main wing with the left front wing ; a right linear support for connecting the right main wing with the right front wing ; a first group of multiple lift propellers which are arranged on the left linear support , each lift propeller in the first group of multiple lift propellers having a radius of gyration; a second group of multiple lift propellers which are arranged on the right linear support , each lift propeller in the second group of multiple lift propellers having a radius of gyration; wherein the left linear support and the right linear support each have a hollow interior; wherein a plurality of motors are arranged in the hollow interior of each of the left linear support and the right linear support ; at least one air inlet (170A; 170B) which is provided below at least one lift propeller in the first group of multiple lift propellers and the second group of multiple lift propellers and provided on the top side of each of the left linear support and the right linear support ; and at least one air outlet which is provided on each of the left linear support and the right linear support , wherein the at least one air outlet is provided on the top side of each of the left linear support and the right linear support below the radius of gyration. a left main wing and a right main wing ; a left front wing and a right front wing ; a main body which is engaged with the left main wing and the right main wing ; a left linear support for connecting the left main wing with the left front wing ; a right linear support for connecting the right main wing with the right front wing ; a first group of multiple lift propellers which are arranged on the left linear support , each lift propeller in the first group of multiple lift propellers having a radius of gyration; a second group of multiple lift propellers which are arranged on the right linear support , each lift propeller in the second group of multiple lift propellers having a radius of gyration; wherein the left linear support and the right linear support each have a hollow interior; wherein a plurality of motors are arranged in the hollow interior of each of the left linear support and the right linear support ; wherein the left linear support and the right linear support each have a hollow interior; wherein a plurality of motors are arranged in the hollow interior of each of the left linear support and the right linear support ; at least one air inlet (170A; 170B) which is provided below at least one lift propeller in the first group of multiple lift propellers and the second group of multiple lift propellers and provided on the top side of each of the left linear support and the right linear support ; and at least one air outlet which is provided on each of the left linear support and the right linear support , wherein the at least one air outlet is provided on the top side of each of the left linear support and the right linear support below the radius of gyration. <EOS>