VORTEX GENERATORS / BLE

To delay the onset of MACH buzz and obtain a higher Mmo, these aircraft designs may incorporate the use of both vortex generators and small triangular upper

wing strips as boundary layer energizers. Both systems seem to work equally. well, although the boundary layer energizers generally produce less drag.

Vortex generators are small vanes affixed to the upper wing surface, extending approximately 1 to 2 inches in height. This arrangement permits these vanes to protrude through the boundary layer air. The vortex generators deflect the higher energy airstream downward over the trailing edge of the wing and accelerate the boundary layer aft of the shock wave. This tends to

delay shock-induced flow separation of the boundary layer air which causes aileron buzz, and thus permits a higher Mmo.

* 52 Vorteex Generators

(26 each wing)

Total of 3 may be missing

(Refer to MEL)

* 22 Boundry Layer Energizers

(11 each wing)

None may be missing