First of all, let me say that I appreciate, and can imagine also everyone in this Topic, that someone working with Asobo could share these informations!
My perception is that the Modern Flight Model has the tendency to overestimate Stability Across the range of Aircrafts. From the Ultralight, to CRJ and Airbuses, it always will by standard calculate by Default too much Stability, specially on the Yaw and Pitch Axis. Its interesting you mention the Scalars are not normalized, because thats exactly oposite of what is stated multiple times at the SDK. It always make the Point, for multiple atributes, that a value of 1 should be the most realistic solution found by the Simulator for the entered aircraft attributes. If thats not the case with the Control Surface Scalars, maybe I think it would be better for it to be more clearly stated.
Another issue that comes to my mind, is that the Simulator has taken this approach of the Virtual WindTunnel, specially because they wanted a system that would make developing easier and faster, by having a system that would use the real dimensions and data for the aircraft, and come with the solution on it’s own, resulting in a more realistic output that would be possible than by estimates and guessing from the Developer to approximate the desired result. That would be specially true for airplanes that has no Aerodynamic Data available online, which are actually the case for most of them. Not even the Airfoil for many of the modern GAs are available since that is all classified information.
If the Scalar are not normalized, and the Virtual WindTunnel is unable to achieve satisfactory results, note i am saying satisfactory, because achieving a spot on Aerodynamic Model for an airplane based on a computer is something that only professional grade CFD Simulations on SuperComputers can do, so that will never be a realistic expectation from a Desktop Simulator, but Satisfactory I mean around the ballpark of what an airplane that would be allowed to be certified by being having resonable and predictable flight handling, that should be a priority IMO for the Team for the next Sim Updates.
Its a simulator still in its infancy, an I dont think we should expect the same level of fidelity other Sims have achieved after over 10 years of continuos improvements and polishing. Having said that, when there is a trend of Overstimation of Stability by the Modern Flight Model identified on most, if not all, aircrafts available since launch, unless the developer has worked on the issue himself to overcome the initial undesirable result, it’s for me easy to wish that Asobo team worked themselves on why this is happening in the Core of the Calculations, and bringing it closer to what an airplane, even the most exotic ones, should present as derivatives, translated as terms of flying qualities, that should be within range of the most extremes oposite values that would be within bounds of what doesnt translate into a very undesirable flying experience. The same happens for real aircraft certification steps, and its not what the exactt nmbers that matters, but if its within acceptable parameters.
Hope these kinds of chat between users and Asobo team, increases, as it can be very beneficial for both sides to make this experience better!