Which is the correct speed range for Aircraft Performance Category B?

• A. 79-90 kt
• B. 91-120 kt
• C. 121-140 kt
• D. 141-165 kt

Answer: (B)

The speeds are grouped to classify aircraft by typical approach and landing performance, helping pilots and planners apply the right margins, distances, and runway requirements. For many training and performance manuals, the moderate-speed category is defined as airplanes that fly around 91 to 120 knots. That makes sense because it sits between the slowest category, which covers lower speeds, and the faster categories that cover higher speeds.

So the correct range, 91–120 knots, represents that middle band of performance. The other ranges would place an aircraft into slower or faster categories, which have different planning and performance implications. In practice, you’ll see this band used as the standard definition for this category in many manuals and exams.