Nozzles not moving during flight, but move when gear down

[Nealius]

Track attached. Note that in-flight with gear up, the nozzles hardly move with throttle changes. When advancing to MIL the nozzles open ever so slightly, and when going to idle they close ever so slightly. 

However with gear deployed, nozzles move as expected: they close when throttle is advanced to MIL, and open when reduced to idle. Note that when the gear is raised, the open idle nozzles snap to a closed position. 

Nozzles.trk

[draconus]

This is correct afaik, basing on how it works described in RL manual of F-15A.

[Rainmaker]

No bug there. Correct behavior. 

[Nealius]

That's interesting. Is this only on Mudhens or on the light grays too? The FC3 F-15C doesn't appear to model this.

[draconus]

8 hours ago, Nealius said:

That's interesting. Is this only on Mudhens or on the light grays too? The FC3 F-15C doesn't appear to model this.

Both should behave the same to my knowledge. If the FC3 F-15C does not - you probably should report it in FC3 subforum but last time I checked it was working fine.

Edited June 26, 2023 by draconus

[Rainmaker]

14 minutes ago, Nealius said:

That's interesting. Is this only on Mudhens or on the light grays too? The FC3 F-15C doesn't appear to model this.

Called ground idle thrust. Common to a lot of Pratt motors at the time. F-15s, F-16s….

The FC3 F-15C engine modeling is missing a lot of fidelity. 

Edited June 26, 2023 by Rainmaker