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Guest Fabio Miguez

Arirfile Specifics

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Hi Everyone:I'm working on tweaking the airfile to Mike Stone's B757-200. For some reason, on my system, the aircraft is always coming in nose heavy and down a few degrees below the horizon, many times striking nose wheel first despite my best efforts to control airspeed and flap settings as published in the manuals. I was slowing to something like 100 knots indicated on final with full flaps and 33% fuel load.......there's no way that's correct, the cessnas were passing me by and ATC was getting all over my case to keep up the airspeed!Anyway, I fixed the airspeed issues by adjusting incorrect weight settings in the .cfg file, and the nose down attitude is a bit better as a result, though I'm wondering if there's a way to more specifically adjust this nose-low attitude by adjusting the center of gravity or some other parameter. Please help! When I finish, I will upload the modified airfile into the file library.Thanks in Advance, Alex ChristoffN562ZMinneapolis, MNThermobulb@aol.com

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Hello Alex.I have just started messin around with AIR files, so maybe someone else can help you in a better way, but here is what I can suggest:In the Tunning section (accessible both through Flight Sim's FSEditor, or through the aircraft.cfg) there is a variable called Cruise Lift Scalar. It is set at 1.00, most likely, and controls the pitch attitude in cruise flight, so that your plane can behave like the real thing. I do not know what it does at slower than cruise speeds, but you may give it a try.You may also change the incidence of the wing, but I have to make a big warning here: BACKUP THE ORIGINAL FILE! This can be an extremelly sensitive variable. To give you an example, the plane I am working on now has the incidence set at .346. At .347 or .345 it is absolutelly unfliable! So be careful, experiment, and don't get disappointed, it may take some time.

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>You may also change the incidence of the wing, but I have to >make a big warning here: BACKUP THE ORIGINAL FILE! This >can be an extremelly sensitive variable. To give you an >example, the plane I am working on now has the incidence set >at .346. At .347 or .345 it is absolutelly unfliable! So >be careful, experiment, and don't get disappointed, it may >take some time. Don't forget Fabio, that you can insert commentary anywhere you like as follows:wing_incidence=1.499634 //original value: 1.489532BTW, where is this wing_incidence=0.346 ???In my aircraft.cfg file, it is set as indicated above for real; the //original value: is just a bogus comment I inserted for illustration... :)

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Fabio:Thanks for your input, I'll experiment with the cruise lift scalar until or unless I learn of anything more specific.Alex ChristoffN562ZMinneapolis, MNThermobulb@aol.com

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Hey Bill.I had to change the original value to fit changes I did in the original file. The resulting wing incidence is the only one that fit. But again, I am far from getting close to being done :-), so it all may change, mostly now that I have the coordinates for the visual model origin.And yes, you can input comments, but I do not use a text editor to change the aircraft.cfg. rather, I use MS's FSEditor, and there you cannot input the comments, so I rather backup the AIR file, change it, and if it doesn't work, voila, I can just open the old one and copy and paste ;-).

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