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Originally Posted by TomcatViP
Home computating power is not the real limiter for flight Sim.
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erm... it is actually. There is virtually no limit to the intricateness of a flight model, but it will need more and more computing power. You could build a CAD model of a Spitfire and
simulate fatigue on each single screw if you wanted to, but it will need a lot of computing power.
Quote:
Think that your FM does not hve to compute how your plane will behave to any kind of solicitation. Most of the Maths are done once for all B4 you release your FM.
For example if I want to simulate flight buffeting on low level flight at high speed I won't hve to actually calculate for each image projected on the screen how my ctrl surface will behave and than what wld be the amplitude of the plane then pilot head shaking !! An average non harmonic solicitation will do the trick 
Good Phy and Math are essential to hve a nice FM. But an overall comprehension of what you hev to look too or generally speaking a comprehension of the flight phenomenas (and I didn't say "sciences") is of utmost importance.
Years ago Engineers where computing real FM with computers that had the power of a today pocket calculator. Nowadays a millions more power is used at every steps of the process by any one in the dev chain (thx to CAO requirements)... And we don't do better planes (F35/Typhoon/A400M etc...)
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I'm sorry but I don't think you have a full understanding of the topic man, or if you do, your explanation is ridden with generalisations.
Engineers don't calculate flight models, a flight model, even when
accurate, is an
approximation used for simulators. To design a plane you can render in CAD the surface and structure and calculate loads or aerodynamic coefficients, but you will still need to build and test prototypes.