FDM: use reallife measured coefficients

[HHS81]

use real life measured coefficients from:
Brockhaus, R. (2013): Flugregelung. Physikalische Grundlagen. Mathematisches Flugzeugmodell. Auslegungskriterien-Regelungsstrukturen. Entwurf von Flugregelungssystemen. Entwicklungslinien. Springer Verlag Berlin Heidelberg GmbH

[xcvb85]

Good find 👍
Ich will check if I can get this book.

[HHS81]

Got the Ebook, unfortunately only readable via the browser. (but much, much cheaper - it is a 800page book...)

[HHS81]

With the input of the datas from the book, the aircraft behaves quite well, and feels really good.
Some datas were missing and had to be guessed.
One problem is that the Dornier 328 uses elevator trim tabs. Unfortunately the Dornier 328 needs 50% NU trim at takeoff. In reality only the yoke force changes, nothing else. In FlightGear the elevator output changes. Only ideas how to solve this with the new datas, but nothing to show yet.

[xcvb85]

Great 👍

[HHS81]

Ouch ...doesn't like stormy monday yet. 🌬

[xcvb85]

And doesn't like the new autopilot settings either. Let me know if I should adjust the autopilot.

[HHS81]

Rest now calm in windy, turbulent weather. Needs a lot of rudder in crosswind, and not much aileron. But 50ktn is too much - the real one has been tested up to 21ktn.

[xcvb85]

Please have a look at this:
https://books.google.de/books?id=tA7vCAAAQBAJ&pg=PA20

Too bad that Dornier prevented a publication of the drag scale but maybe it can be guessed:
https://books.google.de/books?id=tA7vCAAAQBAJ&pg=PA24

[xcvb85]

This is the lift/alpha curve from the wind tunnel test:

		<function name="aero/force/Lift_alpha">
			<description>Lift due to alpha</description>
			<product>
				<property>aero/qbar-psf</property>
				<property>metrics/Sw-sqft</property>
				<table>
					<independentVar lookup="row">aero/alpha-rad</independentVar>
					<tableData>
						-0.077 -0.30
						-0.057 -0.20
						-0.038 -0.10
						-0.018  0.00
						 0.000  0.10
						 0.020  0.20
						 0.037  0.30
						 0.056  0.40
						 0.076  0.50
						 0.095  0.61
						 0.114  0.71
						 0.132  0.80
						 0.152  0.90
						 0.172  0.99
						 0.191  1.07
						 0.210  1.15
						 0.230  1.22
						 0.249  1.29
						 0.267  1.35
						 0.285  1.29
						 0.303  1.27
						 0.321  1.30
						 0.338  1.31
						 0.357  1.25
					</tableData>
				</table>
			</product>
		</function>