PLT238: Aspect Ratio
What code PLT238 covers, why the FAA tests it, and how to study Aspect Ratio before your checkride.
Recall forces acting on aircraft - aspect ratio
What this means for your checkride
Aspect ratio is the wing's span divided by its average chord, in effect how long and slender the wing is. A higher aspect ratio produces less induced drag for a given amount of lift, which is why gliders and efficient cruisers use long, thin wings.
Aspect ratio drives induced drag and therefore climb, glide, and cruise efficiency, so the FAA tests how wing shape trades efficiency against weight and structure.
A longer wing is not automatically better. High aspect ratio cuts induced drag but adds bending loads and weight and slows roll response, so a design balances it against the mission.
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.