of the aircraft the following blade set s 101 b can be rotated to an embodiment of the collapsed configuration shown in fig2 the collapsed configuration reduces the frontal area and aerodynamic drag of the fan because the position of the collapsed configuration is in line with the travel of the aircraft represented by the arrow in fig2 additionally the collapsed configuration may reduce the overall width of the aircraft allowing for easier transport and storage in the collapsed position the driven blade set 101 a and the following blade set 101 b are positioned such that the fan blades of the driven blade set 101 a and the following blade set 101 b are in line with one another that is in the collapsed configuration a substantially zero degree spacing i e the stowed angle is configured between a pair of fan blades of the lift fan the change from the deployed configuration to the collapsed configuration and vice versa may be accomplished by several mechanisms in one embodiment a mechanism moves the following blade set s 101 b between the deployed configuration and the collapsed configuration and vice versa using the motor that powers the lift fan and without the user of additional motors and or actuators in one embodiment the following blade set s 101 b of a lift fan pivot about.