FAA Part 107 Remote Pilot (UAG)Loading and PerformanceEasy
A remote pilot loads a fixed-wing sUAS with a payload that exceeds the manufacturer's maximum takeoff weight. What is the most likely effect on the aircraft's performance?
- AIncreased climb rate and decreased power consumption
- BNo measurable effect as long as the batteries are fully charged
- CReduced climb performance and increased stall speed
- DDecreased stall speed and improved maneuverability
Show answer & explanationAnswer & explanation
Correct answer: C. Reduced climb performance and increased stall speed
Exceeding maximum weight increases the lift required from the wing, which raises stall speed and reduces the excess power available for climbing. This also shrinks structural and performance margins.
Why the other options are wrong
- A. Overweight aircraft need more, not less, power and climb worse.
- B. Battery charge does not offset the physical effects of excess weight.
- D. Stall speed increases, not decreases, with added weight.
Overweight Operation
Operating a sUAS above its maximum takeoff weight increases stall speed, reduces climb rate, and reduces the structural safety margin.
- Stall speed rises with weight
- Climb rate and maneuverability decrease
- Takeoff/landing distances increase
Memory trick: Heavy bird flies slow and stalls fast.