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TrevorS

Flight dynamics for the 777-300ER

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I am most frustrated with regards to the FD of the 773ER. I have a very serious porpoising problem at altitude.I know that somewhere out there is a solution.Could someone please, who has a very stable FD for the -300ER, send me a copy of the FD files. I do have the original -300ER package and can produce proof of payment if necessary.All I want is a stable FD for this otherwise beautiful plane.ThanksTrevor

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Hey thanks! I'll have to look into this as well. Maybe if it flies like a big airliner instead of a paper plane I'll like it more.

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He pulled the FDE's for the 777 off his site to make improvements to them. Stay tuned and be a little patient and they will be back up and hopefully better than ever.

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Hi,Pfff... what a mess, looked into it, but there are many flaws in the FDE, but you can try, below settings in the file, AP_control_coeffs.dat (if not available make with notepad) and enter:RollOnAilACC=3.85RollOnAilDECEL=5RollOnAilINPUTSTEP=1800RollOnAilMININPUT=1000RollOnAilMAXINPUT=31000PitchOnElevatorACC=1.0PitchOnElevatorDECEL=2PitchOnElevatorINPUTSTEP=100PitchOnElevatorMININPUT=-12384PitchOnElevatorMAXINPUT=14384VSonPitchACC=850VSonPitchDECEL=1500VSonPitchINPUTSTEP=1.5VSonPitchMININPUT=-15VSonPitchMAXINPUT=30SpeedOnElevatorMaxAcc=1SpeedOnElevatorDecArea=15You can play with the values, to stop the porpoising, but its seriously overpowered, and lachs drag and more after a quick glance.However, I couldnt find my old fde for the 777, dont have it anymore, so it needs a lot of work to get it right again. You might even try a freeware FDE or even the original one to get a more better performance.I dont have the time yet to repair a payware aircraft what PSS should do themselves.JohanA LITTLE LESS CONVERSATION, AND A LITTLE MORE ACTION PLEASE..http://www.jdserver.mine.nu/johan

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Johan, Trevor,I don't believe that 777 porpoising was/is an FDE problems. I only ever saw it at more than 8X + simulation and it was always cured by disengaging/re-engaging the AP. Some suggested it was due to step weather changes from other add-ons.However, I might have Johan's 777 FDE on an old hard drive somewhere {I try not to throw anything out!} - if I find it I'll post it here.John R

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One thing puzzles me.......I've looked in my PSS B772LR installation but cannot find a FDE file??. Is this a case of "A Rose of any other name, may smell as sweet" :) IOW's are we talking about an air.file? If so, I could post my air file, which may help.If not, could someone tell me where to find the FDE file, please?Ken

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Don't panic, there is no such thing as an FDE file. The FDE (a term from many years ago I believe "Flight Dynamics Editor"?) comprises the information in both the aircraft.cfg and the relevant .air file.

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Johan,I have a backup copy of three airfiles and notes from your website about aircraft.cfg modifications if you want them :-)

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Thanks for the FDE info, Graeme, another long standing irritation sorted :)Ken

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Graeme,Can you email them to me at efisher2 [at] cfl.rr.com? Thanks!

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