Reverse thrust?

Question

i know that reverse thrust is when you touch down on runway and the engine kinda opens to help slow down the speed of the aircraft but my question is

1.what kind of planes have reverse thrust

2.what exactly is happening

3.do you still need full flaps

4.does it do it automatically or does the pilot have something they push to activate it

Answer 1

most commercial airliners have reverse thrusters.

vanes on the rear of the engine rotate into the thrust and direct it slightly forward.

flaps are still needed for the in-flight portion of landing. must be at slow speeds not available with no flaps.

reverse thrusters are manually set, but have redundancy lockout to prevent in-fight deployment.

Answer 2

on a turbofan engine,  the aft end of the nacele splits into two pieces (called "thrust reversers"), one above and one below, that swivel back, blocking off the nozzle and redirecting the thrust forward.

flaps are effective while airborne, thrust reversers are only deployed on the ground.

if the pilot has enabled the thrust reversers while the aircraft is airborne, they will deploy when the weight of the craft has settled on all of the landing gear.