Aircraft Thrust Reversers
Thrust reverser system and the different styles of design.
Welcome everyone to ATA 78
As stated in the video these are some of the variations of thrust reverser designs. Mostly showing you the CFM family engines. First one being the CFM56-7B then the CFM56-5B.
A bit more details on the -7B. Each T/R has a left and right half. Each half has a translating sleeve which moves aft for reverse thrust. The two sleeves on each T/R work at the same time but are independent of each other. It is permitted for one sleeve to move before the other. The two sleeves do not have to move together, but do have to deploy/stow in the time limits. The two sleeves can have a lag in movement because of the frictional differences between tolerance stack-ups in the thrust reverser assembly for the inboard and outboard sleeves. Three hydraulic actuators move each sleeve. Rotary flex shafts make sure that the hydraulic actuators extend and retract at the same rate.
The -5B is a bit different as you can see, it changes it’s design to blocker doors that pop out outside the T/R cowling. 4 per engine and one actuator per door. The look of it is different but does the same job and still electrically controlled and hydraulically actuated.
There are different engines that use ADP (air driven pumps) to deploy T/Rs they will translate the motion to cables that will drive a jack screw and deploy thrust reverser‘s.
Lastly you have the classic clam shell that is equipped on the JT8D model engine. Also very notably seen on corporate aviation aircraft. Hope you guys enjoyed the video, feel free to ask questions in the comments. Thank you and have a wonderful day.
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