Angle of attack decreased Blade rotation Maximum upward deflection Maximum downward deflection Angle of attack increased Blade rotation Direction of travel Helicopter movement Thrust Drag Weight Lift Resultant Resultant Weight/drag Lift/thrust Vertical/ascent Figure 2-33.  To transition to forward flight, more lift and thrust must  be generated to overcome the forces of weight and drag.  Figure 2-32.  Balanced forces: hovering in a no-wind condition. Figure 2-31.  As each blade passes the 90° position on the left in a counterclockwise main rotor blade rotation, the maximum increase  in angle of incidence occurs. As each blade passes the 90° position to the right, the maximum decrease in angle of incidence occurs.  Maximum deflection takes place 90° later—maximum upward deflection at the rear and maximum downward deflection at the front—and  the tip-path plane tips forward. 2-18