How to configure SLEW exit speed?

[MSFS 2020] Questions & Community Discussions
1

I’ve set all the .FLT files in my package SimObject// folder to include

[SimVarForSpawningInTheAir.0]
IAS=70

but if I slew up from stationary on the ground to say 3000 feet then exit slew then the airspeed immediately gets set to 226 Knots (which is spectacularly above Vne).

If I choose ‘slew’ via flying, slew up, then exit, then the airspeed is the same as when I entered the slew (which is kinda fine so long as i didn’t slew because I’m stalling)

FWIW the flight_model.cfg includes

[REFERENCE SPEEDS]
full_flaps_stall_speed =    40
flaps_up_stall_speed =      50
max_mach =                  0.27
max_indicated_speed =       155
max_flaps_extended =        91
normal_operating_speed =    65
airspeed_indicator_max =    200
rotation_speed_min =        69
cruise_alt =                1500
spawn_cruise_altitude =     1500
spawn_descent_altitude =    500
best_angle_climb_speed =    0
approach_speed =            60
best_glide =                40
max_gear_extended=          272

; Winch
takeoff_speed = 47 ;
climb_speed = 77;
cruise_speed = 87 ;

Many thanks

Can anyone confirm the exact configuration file entry MSFS is looking for to reset the airspeed on slew exit ?

2

Bump… this should be super-simple I think, I just don’t know the definitive answer.

We slew gliders a LOT, i.e. you’re on a 2-hour multi-player cross-country flight, get a bit low, decide to slew back up a couple of thousand feet so at least you can continue the flight with the other players. But, that currently injects what seems like a random airspeed including Vne+50% into the aircraft but presumably there’s a cfg file entry somewhere that MSFS is basing that decision on.

If it is simple, any help appreciated. If this is somehow really complicated it would be good to know that. The reason I’m posting in here rather than the user forums is I’m a key developer on all the MSFS gliders (including the MS stock gliders) and if I’m missing something in the design that’s important to know.

3

Hello,

if you can write a small WASM gauge for it, you can control when you are in slew and exit it to then set whatever speed you wish upon exit (and for a few update cycles to ensure it ‘sticks’).

4

thanks - good idea for an ultimate backstop, I guess I could do that even in the model RPN. Feels like a hack though

  • this only happens if the plane is slewed up from the ground. A mid-air slew sets an airspeed similar to before the slew.
  • different planes have different slew-from-the-ground airspeeds although they seem pretty random,

maybe Google’s AI mode has the answer:

Inconsistent Behavior: Frequently, exiting slew mode results in the aircraft unexpectedly having a high speed (e.g., 226 knots) or entering an immediate stall. In some cases, if the plane is just slightly off the ground, it may exit with full power, resulting in a sudden zoom.

that 226 knots is strangely exactly what I’m seeing, although another glider (the GotFriends Discus) has an “airspeed after ground slew” of around 10 knots. Maybe there’s no dev-capable control involved and MSFS is just doing what it does, and this should be a “user” forum bug-report entry.

5

Either way it would be good to have a proper answer on what exactly determines it, and perhaps improvements if whatever that is doesn’t make sense/isn’t workable.

1 Like