PLT523: Vortex Generators
What code PLT523 covers, why the FAA tests it, and how to study Vortex Generators before your checkride.
Recall vortex generators - purpose / effects / aerodynamics
What this means for your checkride
Vortex generators are small vanes on the wing or tail that energize the boundary layer, mixing faster air down to the surface so the airflow stays attached to a higher angle of attack. That delays the stall and keeps control surfaces effective at low speed, often lowering the stall speed or improving low-speed handling.
Vortex generators change stall and control behavior, so the FAA tests what they do to the boundary layer and the stall.
Pilots think vortex generators just add drag. By keeping airflow attached longer they delay separation, improving low-speed control and often reducing the stall speed, a net benefit for handling.
Where to study it
A code on your test report is an area of deficiency. An authorized instructor must review it with you and endorse that review before you take the practical test, and the examiner may revisit it during the oral. Study it until you can explain it out loud, not just recognize the answer.