Which of the following are common types of thrust reversers?

The correct answer identifies common types of thrust reversers as aerodynamic and mechanical blockage.

Aerodynamic thrust reversers work by redirecting the airflow produced by the engines to create a reverse thrust during landing, effectively slowing down the aircraft. This is accomplished through movable surfaces or aerodynamic changes that direct the exhaust flow forward rather than rearward.

Mechanical blockage thrust reversers utilize physical barriers that obstruct the engine’s exhaust flow, creating drag and effectively reversing thrust. This is usually achieved through the deployment of clamshell doors or bucket doors that block the normal exhaust path, redirecting it to force the aircraft forward to slow it down.

In the context of the other options, while hybrid and electric thrust reversers may exist in conceptual discussions about future technologies, they do not represent the common types used in existing aircraft. Rotary and linear could refer to mechanisms of operation in some specific designs but are not standard classifications in the broader context of thrust reversers. Likewise, the static and dynamic classification does not provide a clear operational framework specifically for thrust reversers. Understanding these common types helps in identifying the mechanisms used in various aircraft to ensure safe and effective landing operations.