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PostPosted: Wed May 09, 2012 7:14 am 
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I'm looking at a chart here, for a particular jet, called "buffet onset boundary". I can see that for 1 G, 0 degrees of bank all the various curves for weight and altitude go asymptotic at around .84 Mach and that is where the buffet occurs. The Mmo of this airplane is also noted to be .84 mach. Is that how Aero engineers define Mmo...the mach number at which all the alt/weight curves for 1G level flight converge??? So when setting this plane up for Accu-Feel, I would be inclined to use .84 mach as the VneMach number, and that is probably what is also defined in its aircraft.cfg file as Max Mach, so would be used as the default value by Accu-Feel in any case. But that buffet onset value is only applicable for a 1 G load...as soon as I start maneuvering, those numbers decrease.

If I'm at 40 degrees of bank (1.3 G) at 35,000 feet at weight X, the buffet onset according to the table occurs at .79 mach; at 60 degrees of bank (2G), higher weights, higher altitude, it occurs as low as .7. So on, and so forth.

I don't know the math for this kind of stuff, but I'm sure you guys do: If you don't have the specific table for a given airplane, is there any way possible for future versions of Accu-Feel to account for G loads other than 1, by extrapolating it from the "book" Mmo or other characteristics found in the Flight Model? Or would that be far too generic? (I'm fine with it the way it is, because I know that Accu-Feel is supposed to be more for fun and ambience rather than hardcore physical representation, but I'm just curious...always trying to understand a little more)

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PostPosted: Wed May 09, 2012 3:39 pm 
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While I am all for getting into the deep details, a buffeting onset ramp isn't high on the list of items, at least now. Perhaps down the road when we are looking for things to add, this would be the right time.

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