on video How Flight Controls Work | Spoiler and Speedbrake

 Aircraft systems explained.

* Primary flight control system. * Speed brake mechanism. * Control wheel mechanism. Major components covered. * Primary flight computer, actuator control electronics and Autopilot flight director computer. *Control wheel, control cables, cable drums, speedbrake lever and back drive actuator. * Power control unit, aileron, flaperon, spoilers and position transducers. Software's used for making the video. * Blender 3.0 and Filmora 10. Background music used in the video. * Dynamite (Filmora stock library).In aeronautics, a spoiler (sometimes called a lift spoiler or lift dumper) is a device intended to intentionally reduce the lift component of an airfoil in a controlled way. Most often, spoilers are plates on the top surface of a wing that can be extended upward into the airflow to spoil it. By so doing, the spoiler creates a controlled stall over the portion of the wing behind it, greatly reducing the lift of that wing section. Spoilers differ from airbrakes in that airbrakes are designed to increase drag without affecting lift, while spoilers reduce lift as well as increasing drag.Spoilers fall into two categories: those that are deployed at controlled angles during flight to increase descent rate or control roll, and those that are fully deployed immediately on landing to greatly reduce lift ("lift dumpers") and increase drag. In modern fly-by-wire aircraft, the same set of control surfaces serve both functions.Spoilers are used by nearly every glider (sailplane) to control their rate of descent and thus achieve a controlled landing. An increased rate of descent can also be achieved by lowering the nose of an aircraft, but this would result in increased speed. Spoilers enable the approach to be made at a safe speed for landing.Airliners are almost always fitted with spoilers. Spoilers are used to increase descent rate without increasing speed. Their use is often limited, however, as the turbulent airflow that develops behind them causes noise and vibration, which may cause discomfort to passengers. Spoilers may also be differentially operated for roll control instead of ailerons; Martin Aircraft was the first company to develop such spoilers in 1948.[1] On landing, however, the spoilers are nearly always fully deployed to help slow the aircraft. The increase in form drag created by the spoilers directly assists the braking effect. However, the real gain comes as the spoilers cause a dramatic loss of lift and hence the weight of the aircraft is transferred from the wings to the undercarriage, allowing the wheels to be mechanically braked with less tendency to skid. (Source Wikipedia) 

 Aircraft systems explained.

* Primary flight control system. * Speed brake mechanism. * Control wheel mechanism. Major components covered. * Primary flight computer, actuator control electronics and Autopilot flight director computer. *Control wheel, control cables, cable drums, speedbrake lever and back drive actuator. * Power control unit, aileron, flaperon, spoilers and position transducers. Software's used for making the video. * Blender 3.0 and Filmora 10. Background music used in the video. * Dynamite (Filmora stock library).In aeronautics, a spoiler (sometimes called a lift spoiler or lift dumper) is a device intended to intentionally reduce the lift component of an airfoil in a controlled way. Most often, spoilers are plates on the top surface of a wing that can be extended upward into the airflow to spoil it. By so doing, the spoiler creates a controlled stall over the portion of the wing behind it, greatly reducing the lift of that wing section. Spoilers differ from airbrakes in that airbrakes are designed to increase drag without affecting lift, while spoilers reduce lift as well as increasing drag.Spoilers fall into two categories: those that are deployed at controlled angles during flight to increase descent rate or control roll, and those that are fully deployed immediately on landing to greatly reduce lift ("lift dumpers") and increase drag. In modern fly-by-wire aircraft, the same set of control surfaces serve both functions.Spoilers are used by nearly every glider (sailplane) to control their rate of descent and thus achieve a controlled landing. An increased rate of descent can also be achieved by lowering the nose of an aircraft, but this would result in increased speed. Spoilers enable the approach to be made at a safe speed for landing.Airliners are almost always fitted with spoilers. Spoilers are used to increase descent rate without increasing speed. Their use is often limited, however, as the turbulent airflow that develops behind them causes noise and vibration, which may cause discomfort to passengers. Spoilers may also be differentially operated for roll control instead of ailerons; Martin Aircraft was the first company to develop such spoilers in 1948.[1] On landing, however, the spoilers are nearly always fully deployed to help slow the aircraft. The increase in form drag created by the spoilers directly assists the braking effect. However, the real gain comes as the spoilers cause a dramatic loss of lift and hence the weight of the aircraft is transferred from the wings to the undercarriage, allowing the wheels to be mechanically braked with less tendency to skid. (Source Wikipedia)