FAA Part 107 Remote Pilot (UAG)OperationsMedium
A remote pilot mounts a heavy camera gimbal payload significantly forward of a multirotor's designed center of gravity before a commercial video shoot. What is the most likely operational effect of this improper load placement during flight?
- AThe aircraft's maximum groundspeed will increase noticeably in level flight.
- BThe GPS receiver will lose satellite lock due to the shift in weight distribution.
- CThe aircraft may become unstable or difficult to control, requiring uneven motor thrust to maintain level attitude.
- DThe battery will discharge more efficiently, extending overall flight time.
Show answer & explanationAnswer & explanation
Correct answer: C. The aircraft may become unstable or difficult to control, requiring uneven motor thrust to maintain level attitude.
Shifting the center of gravity away from the aircraft's designed balance point forces the flight controller to command uneven motor thrust to compensate, which can degrade stability, reduce control authority, and increase the risk of loss of control—especially in wind or during aggressive maneuvers.
Why the other options are wrong
- A. An off-balance load reduces efficiency and control, it doesn't increase safe cruising speed.
- B. GPS lock depends on satellite geometry and antenna clearance, not airframe weight distribution.
- D. An unbalanced load increases power demand on some motors, reducing battery efficiency, not improving it.
Loading and Center of Gravity (CG)
The distribution of weight on an sUAS relative to its designed balance point; an off-center CG forces uneven motor compensation and can degrade stability and controllability.
- CG should align with manufacturer's designed balance point
- Off-center loads cause uneven motor thrust compensation
- Can reduce stability, controllability, and battery efficiency
- Always verify payload placement before flight
Memory trick: Off-balance load = drone tips like a seesaw, motors fight to level it.