Which control group is NOT part of the MQ-9?

The correct choice indicates the control group that is not part of the MQ-9. The MQ-9 Reaper drone utilizes a combination of control surfaces to manage its flight, including ailerons, flaps, and rudders.

In standard aerodynamic configurations, ailerons are located on the wings and are responsible for roll control, while flaps, also located on the wings, enhance lift during takeoff and landing. The rudder, found on the vertical stabilizer, aids in directional stability and yaw control.

The term "ruddervators" refers to a control surface that combines the functions of a rudder and an elevator, typically seen in aircraft designs that use fixed-wing platforms with canard configurations. However, the MQ-9 doesn't employ ruddervators; instead, it has traditional control surfaces. Therefore, the consideration that elevators, which are a part of horizontal stabilizers, do not exist in the form of "ruddervators" in this specific drone is accurate.

This highlights the unique design and control mechanisms of the MQ-9, distinguishing it from other aircraft that might employ ruddervators as part of their control architecture.