[BUG] Glide Ratio too high

[CaptainOveur]

Mod Version

master

{
"built": "2021-02-03T19:03:44+00:00",
"ref": "master",
"sha": "b9245c886074dc9a8a8e6cdfd7724a5a3f8077c5",
"actor": "Benjozork",
"event_name": "manual"
}

Describe the bug

I switched off both engines and flew approximately green dot speed. Winds calm. This resulted in a TAS and ground speed of 234 kt and a sink rate of 900 ft/min. This is a glide ratio of approximately 26:1. As far as I know the best glide ratio of an A320 is about 16, so the number in the simulation is much too high.

Great addon by the way!!!

My background:
Private pilot licence
C172, Aquila 211, Robin 2160 D, Super Decathlon, DA20
No A320

To Reproduce

1. Climb to FL140 in clean configuration
2. Switch on APU
3. Fly a stable green dot speed using pitch.
4. Note the numbers at about FL100 They should be like the ones described above.

Expected behavior

I would expect a much lower glide ratio.

Actual behavior

The glide ratio was much too high, around 26:1.

References

I got the glide ratio of a A320 from here (there should be better sources and it depends on weight and type of course, but 26:1 seems much too high:
https://aviation.stackexchange.com/questions/14814/could-a-commercial-plane-like-airbus-a320-glide-with-no-working-engines-from-110

Additional context

Was this working before/when did the issue start occurring?

Is this a problem in the vanilla unmodded game?
In the original FS2020 A320 the glide ratio is a bit lower, but still too high.

Discord username (if different from GitHub):

[derl30n]

Yes the current flight model still is not very accurate, we are currently working on a brand new engine model and will also improve the flight model along.

[aguther]

It should be much improved now on dev version. Feel free to reopen if you think it’s still wrong.