The following is an introduction to the principle of aircraft thrust reverser: 1, clamshell thrust reverser: When this thrust reverser is opened, the two baffles move inward from the engine wall, and when the two baffles are closed, the tail nozzle is closed. In this way, the airflow is blocked in the gap of the engine wall before reaching the tail nozzle, providing reverse thrust. 2. Grab thrust reverser: This thrust reverser is a part of the tailpipe. When the tailpipe is opened, two hydraulically operated articulated grab buckets are used to reverse the jet of the engine to generate thrust, thus blocking the airflow originally flowing out of the tailpipe and splitting it into an oblique forward airflow, thus providing a reverse thrust device. And the expanded thrust plate also adds some resistance.