feat(a380x/fctl): Automatic THS trim after engine start or touch and go

[flogross89]

Summary of Changes

Adds auto THS trim after engine start or when performing touch and go.
Also, cleans up some XML for the pedestal and the visibility conditions for the magenta GW CG box in the PFD's pitch trim indicator.

Conditions for engine start:

• First engine is started and a hydraulic system (G or Y) is pressurized OR
• Ground spoilers become armed

Conditions for touch and go:

• On ground for at least one second
• Airspeed greater than 80kts
• One of the following actions performed: Flaps lever moved, ground spoilers disarmed or at least one thrust levers moved out of IDLE

Screenshots (if necessary)

References

Additional context

Discord username (if different from GitHub):

Testing instructions

1. Start cold&dark at gate
2. Perform engine start per SOP, THS trim should move automatically
3. Perform take-off, traffic pattern and touch and go. THS trim should move automatically during touch and go
   Verify, that magenta PFD pitch trim indicator is only visible after first engine started and HYD is pressurized, and disappears after takeoff (not visible for landing)

How to download the PR for QA

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[aadee9940]

I know the code is still ready for review, but i had a bit of time so just wanted to try it out.

Engine start automatic THS:
https://github.com/user-attachments/assets/240ac7c7-6321-4efe-bfe5-1ff833cdf886

Touch and go:
This one I am not sure about, after doing the traffic pattern, on the approach, shouldn't LAND and FLARE be on the FMA? As well as ROLLOUT. Anyways, during touch and go, set flaps to FULL->3 and TOGA. The THS value on the SD was changing.

2025-02-08.22-26-47.mp4

[Ueeew]

@flogross89 I just wanted to give a few tips or improvements. The first thing I noticed is that process of setting the trim automatically takes way to long. In the real aircraft the process of setting the THS takes only about 2-3 seconds(Real video for reference). In the FBW it takes about 5 or even longer.
The second thing is that the purple box, indicating the optimal THS setting ,is IR only shown a few seconds prior to auto THS setting process (shown in video). In FBW the box is shown the whole time as long as THS setting is visible on PFD.
https://m.youtube.com/watch?v=uEgw2p8J0ZA&t=775s&pp=2AGHBpACAcoFDUEzODAgdGhzIHRyaW0%3D
The engine stat sequence is at minute 2:45. Unfortunately you may have to zoom a bit in to see the process.
hopefully this helps

[flogross89]

@aadee9940 Thanks a lot! Have you considered joining our QA team?
It seems you didn’t arm any approach mode for your landing, but instead followed the flight plan guidance down to the runway. Did you tune an ILS, and press APP to intercept LOC and G/S?
The FMA modes are untouched by this PR, so that also wouldn’t be related.

[flogross89]

@Ueeew Very helpful, thanks! Indeed, the speed is far too slow, might need to check my triggering mechanism again, I believe I have to use another method.
about the magenta box: Also well spotted, I suppose the GW CG comes from the FQMS, which only sends these values after engine start or some other condition. I‘ll investigate in my references.

[aadee9940]

@flogross89 unfortunately I don't have access to the FBW server as before, but if the mods want to have a look at my appeal LMK 😊

Yeah it completely left my mind I have to program my automatics to get proper FMA modes on landing, my fault 😂.
It was a fully visual circuit so yeah, but I hope my test shows what you are looking for? (The THS trim moving on the SD)
Wasn't really sure if this was EXACTLY what you were looking for..

[flogross89]

@aadee9940 Ah, didn't know that. I'm not a mod so I don't know any details, but I trust their process. Yep, that's what I wanted to see,

@Ueeew I changed the trim triggering mechanism, it should now use the full available speed (which is limited by the PRIMs, so that should be accurate).