Flaps/Gears Limit

[clabal]

DBE wrote:
The thresholds for the individual aircraft are contained in their aircraft.cg and, thus, independent from FSP

I agree. I had the same problem when I converted an AI-aircraft (md 83) into a normal aircraft. You can change the settings in the aircraft.cfg file
(make sure you make a backup of the original file).

The standard aircrafts (for example: boeing 737-400) in FS have a very clear description, e.g.:

//14 Airspeed limit for retraction (KIAS)
//15 Airspeed that gear gets damage at (KIAS)

[contact_points]
point.0=1, 40.00, 0.00, -8.40, 1181.1, 0, 1.442, 55.92, 0.6, 2.5, 0.9, 4.0, 4.0, 0, 220.0, 250.0
point.1=1, -7.75, -8.58, -8.60, 1574.8, 1, 1.442, 0.00, 1.0, 2.5, 0.9, 6.9, 6.9, 2, 220.0, 250.0
point.2=1, -7.75, 8.58, -8.60, 1574.8, 2, 1.442, 0.00, 1.0, 2.5, 0.9, 7.1, 7.1, 3, 220.0, 250.0

Select column 15 under the section contact_points and you will see the gear gets damage at 250 KIAS.
But I always use 220 KIAS as the reference speed.

For the flaps you have to look under the sections flap.# for the damaging speed, e.g.:

damaging-speed = 250 // KIAS
blowout-speed = 300 // KIAS

The knee-board can be useful to retrieve this information, but I have noticed that not all aircrafts have a knee-board and not all the contents in the
knee-board are correct.
So, if you want to be sure or want to change these parameters it is better to consult the aircraft.cfg file.

I also agree, the limits are independent of FSp. FSp just reads the data out of the aircraft.cfg file.