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Question about reverse thrust

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Am I correct in thinking that if I hit F2 once, i get idle reverse thrust, and then if I hit F2 again, it's increased to low reverse thrust, and so on and so on? I think that's what's happening but I'd like to confirm.thanks

Am I correct in thinking that if I hit F2 once, i get idle reverse thrust, and then if I hit F2 again, it's increased to low reverse thrust, and so on and so on? I think that's what's happening but I'd like to confirm.thanks
Yup, you got it alright. Too bad it is not the same with wheel brakes

Ed Ocampo
Staff Reviewer
AVSIM Online
[email protected]

pilot.gif
Fly DC Jets

Good for slowing an aircraft that taxis too fast at idle so brakes don't get worn. I have not tried that in FS but I know it is used by some airliners noted in threads in the forums at airliners.net.

Am I correct in thinking that if I hit F2 once, i get idle reverse thrust, and then if I hit F2 again, it's increased to low reverse thrust, and so on and so on? I think that's what's happening but I'd like to confirm.thanks
Good for slowing an aircraft that taxis too fast at idle so brakes don't get worn. I have not tried that in FS but I know it is used by some airliners noted in threads in the forums at airliners.net.
Only on turboprops. Reverse thrust on jets is ineffective at speeds below 60 knots.

Ed Ocampo
Staff Reviewer
AVSIM Online
[email protected]

pilot.gif
Fly DC Jets

Hello,

Only on turboprops. Reverse thrust on jets is ineffective at speeds below 60 knots.
The reverse is effective at any speed or at stop.If you go in reverse you don't need to have the pushback service.But ..... it's forbidden (or at least highly not suggested) to activate reverses on the aprons or taxiways due to the danger of dirt ingestion ...Regards.bye.gifGus.
  • Commercial Member
Only on turboprops. Reverse thrust on jets is ineffective at speeds below 60 knots.
Deploying the reverser buckets on a Citation X during taxi is a common action... so, no it's not ineffective. The reason for no reverse below 60kts is because of the dangers of foreign object damage.

Ed Wilson

Mindstar Aviation
My Playland - I69

The reverse is effective at any speed or at stop.If you go in reverse you don't need to have the pushback service.But ..... it's forbidden (or at least highly not suggested) to activate reverses on the aprons or taxiways due to the danger of dirt ingestion ...Regards.bye.gifGus.
Hi Gus.You could use reverse at any speed indeed, what I meant is that the reverse actually has some positive braking action at high speeds. Same reason why an engine produces more power in the takeoff roll when the airplane is just about to rotate than it did at the beginning of the takeoff roll.
Deploying the reverser buckets on a Citation X during taxi is a common action... so, no it's not ineffective. The reason for no reverse below 60kts is because of the dangers of foreign object damage.
But I'd figure only idle reverse? The F-100 may taxi with one engine of forward idle and the other one on reverse idle.I'd reckon that it is mostly not recommended to use reverse at low speeds due to FOD risk.For jets: Using idle reverse during taxi, yes. Using full (or otherwise positive) reverse during taxi, big no no. Reverse use on a turboprop is a bit less restricted, so to speak.Best regards

Ed Ocampo
Staff Reviewer
AVSIM Online
[email protected]

pilot.gif
Fly DC Jets

While reverse thrust can be used at any speed, most airlines use it sparingly these days due to fuel costs. It also depends on where the engine is mounted on the aircraft. A rear engine mounted aircraft can powerback from a gate, where as wing mounted engine can not. While it mostly has to do with FOD ingestion, it also has to do with breakaway force and more importantly, the thrust from the reverse itself (it also has to do with the ground crew being in the area and getting sand blasted.) This is why an aircraft that is doing a powerback has to roll forward slightly before engaging reverse thrust...otherwise, they would have to use almost full reverse thrust to just get enough break away force. Remember, reverse thrust actually only deflects the thrust outwards and away from the engine. And with a high bypass turbofan engine (like the cfm56-7b) the doors open, which in turn activates a series of panels that deflect only the high bypass fan thrust outwards. In that case, there is actually forward thrust still being produced. The clam shell reverser is by far the most effective reverser system out there. It has the ability to deflect all of the thrust outwards and even slightly forward.In my opinion, it should be called "thrust deflectors" or "deflect thrust" since the thrust never gets fully reversed.Matt

Matt L.

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