How do the flaps operate on the current aircraft and what are the possible degrees?

The operation of flaps on modern aircraft typically employs a mechanical system, allowing for robust and precise control during various flight phases. The degrees of deployment can vary depending on the aircraft design and intended use, but common settings include 10, 20, and 40 degrees. These settings are specifically configured to optimize lift generation during takeoff and landing, enhancing performance and safety.

When deployed, flaps effectively increase the camber of the wing, allowing for lower stall speeds and improved lift at higher angles of attack. The specific angles of 10, 20, and 40 degrees correspond to different flap positions that pilots can select to best suit the aircraft's requirements for different phases of flight, ensuring a balance between lift and drag.

In contrast, other options present different methods of flap operation or degree settings that are either not typical for modern aircraft or do not align with industry standards. For instance, hydraulic systems may be prevalent in many aircraft, yet the specified degrees in those options may not accurately reflect the operational capabilities of current models. Hence, the selection of mechanical operation with the specific angles of 10, 20, and 40 degrees stands out as the most accurate representation of how flaps function on contemporary aircraft.