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Fair enough, and thank you for your time. Cheers!
Went to YBAS,Alice Spring in central Australia this morning and spawned on runway 12 to do some testing with the 777-200er GE version. Standing start to 10 kts and applied reverers.777 came to a stop and started to reverse under power both engines. Did the same up to 40 kts.Same result. Pulled off onto the dirt at the side of the runway.From stand still,tried 1 engine no movement but lots of dust being blown out the front,LOL.2 engines and the 777 started to reverse.More dust,LOL.Shut down the reverse thrust and the 777 came to a slow stop.No fast sprint forward.I’m happy.Bravo throttle set up for 2 engine jet boeing.
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Thanks Marcus. What throttles do you have and what bindings please?
Do you work for PMDG? I can’t believe your bindings work for you. Those are the bindings I use for the Asobo 737 and 787, the Citation CJ4 and the Citation longitude. They work great in those 4 ariocraft and not at all in the PMDG 777. Are you using on press or on release in the settings? Will tinker around today.
To be clear, I apply the TR at stand still and they work but the plane doesn’t move.
As here.I got these from watching on youtube.I don’t have a video capture tool so can’t show a vid for it.
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Can you please tell me which engines you are using? I am using the GE90s.
Thanks. Which engines are you using? I am using the GE90s.
I don’t have the -200 so I can’t test this myself, but I’m curious: Is there a reason you have both Hold Throttle Reverse Thrust and Toggle Throttle Reverse Thrust bound to the same key/position for each engine? To me that’s a red flag for a conflict, but maybe I’m just misunderstanding what’s going on here.
777-200er GE version as above for the engines.
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I have found this setting allows me to vary N1 while in reverse. I will investigate my settings though based on your comments.
Great news from me for me!! I have changed bindings and can now do beautiful power backs with the GE90 777. Thanks to all with their help and suggestions.
The downfall of these new bindings is that reverse thrust is at max N1. My old settings allowed me to vary N1 when the reversers were deployed and also gave me the option of idle thrust reverse.
Here are the settings
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Please post a picture of your bindings from the settings menu! May help others😊
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indeed , did bind now F2 = toggle reverse thrust and F3 = decrease thrust , problem solved … taxi backwards / reverse thrust breaking works now .. thks all !
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I gotta try that. I didn’t have any luck engaging the thrust reversers during landings with my throttle axis so far. If the keys work that would be a good workaround.
It would be preferable if the Toggle Reverse Thrust button bindibg would work with the throttle axis, though.
This is a sign that you’re bypassing some programming somewhere.
The FADEC of these engines limits the amount of reverse power available, specifically so this operation cannot be performed and so that the engines are not unduly taxed. This is why in your original test you found that full reverse thrust N1 was not 100%, but in fact quite a bit lower.
N1 to thrust output is generally an exponential function: in other words, at 100% N1, you have around 100% thrust, but 90% N1 is actually only about 70% of available thrust. At 65-70% N1 you might only have 30% of the engine thrust. This, combined with the fact that reverse thrust is much less efficient, makes it entirely plausible that the plane would not really move much or at all with full reverse. Not every plane does IRL. Some engine FADECs even limit power further, allowing only idle reverse at low speeds even with full reverse selected.
Keep in mind that thrust reversers are not meant to be braking devices IRL; they’re meant to assist in keeping the wheels under positive braking control and traction. This is why with many aircraft runway stop distance planning solutions in their FCOMs you are not allowed to take landing distance credit for reversers unless the runway is contaminated.
Given all this, the fact that the plane does not move in reverse under correct full reverse power does not actually strike me as a bug.
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Thanks for your reply! I had a different binding setup that allowed me to vary my reverse thrust from idle reverse thrust up to about 75% N1 reverse thrust. However, it would not move the plane backwards on the tarmac, when the plane was at a standstill, no brakes and 75% N1.
This alternative binding settings will move the plane backwards.
