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Old 11-30-2011, 05:53 PM
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Quote:
Originally Posted by 41Sqn_Stormcrow View Post
Oh, there is abundance of proof that the 109 for instance is too slow.
Abundance.. Really? Well if there is an 'abundance' of 'proof' than it should be a simple task for you to 'pick one' and provide the link to it for review.. Right?

Quote:
Originally Posted by 41Sqn_Stormcrow View Post
Please look up again the corresponding threads.
I have a beter idea..

As noted, I have 'looked' and have yet to see 'one' that would quality as 'proof'

But maybe I missed the one your refering to?

So since you seem to think there is an 'abundance' of 'proof', please pick the best one and provide the link to it for review, that way we are both on the same sheet of music

Quote:
Originally Posted by 41Sqn_Stormcrow View Post
I guess that there has been similar data posted for other planes as well.
I like to avoid guess work

Quote:
Originally Posted by 41Sqn_Stormcrow View Post
EDIT: On the how to do a sim: I have a couple of years experience in the aerospace business as an engineer and I work for a research institute in this field. One field of our research are hypersonic planes. As any hypersonic plane has to accelerate through the subsonic velocity range (and deccelerate later for landing) we put some effort in studying subsonic aerodynamics. From all experience we have collected I can say one thing: there is not ONE single simplified method that can predict accurately the aerodynamic forces in the subsonic region (but some adequate approximations) for low and medium subsonic speeds. When the speed approaches transsonic speeds it basically gets guesswork.

Only halfway trustworthy aerodynamic results by calculation would be to do the fully viscous NS-equations (provided they can be solved correctly) but this is not at all practicable for a flight sim as the calculation for one flight point only (Ma, altitude, angle of attack, sideslip angle) would take a lot of time and we would need an enormous number of flight points in order to create a sufficiently large data base. And again, as a researcher who respects himself, I would request to verify some calculated points by wind tunnel tests ...

And we yet have not even talked about the damping coefficients which are even more difficult to assess by wind tunnel tests let alone determine by calculations ...
Agreed 100%

As I allready noted, no sim is perfect!

And no sim ever was, is, or will be equal to reality!

Hence the name 'simulation' in place of 'reality'
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Theres a reason for instrumenting a plane for test..
That being a pilots's 'perception' of what is going on can be very different from what is 'actually' going on.
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