fix(a380x/fms): Vapp wind correction

[Waveif]

Fixes #9333

Summary of Changes

Fixed an issue where vapp was taking the full headwind factor instead of 1/3 of the steady headwind.

Screenshots (if necessary)

Before:

After:

References

Reference image is linked in the issue #9333

Additional context

Discord username (if different from GitHub):
waveif

Testing instructions

How to download the PR for QA

Every new commit to this PR will cause new A32NX and A380X artifacts to be created, built, and uploaded.

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2. Click on the Checks tab on the PR
3. On the left side, find and click on the PR Build tab
4. Click on either flybywire-aircraft-a320-neo, flybywire-aircraft-a380-842 (4K) or flybywire-aircraft-a380-842 (8K) download link at the bottom of the page

[flogross89]

Good catch, thanks! To make it more accurate, could you please

• Always add 5kts for manual A/THR on landing technique (which is what we should assume for now), and
• Remove the minimum wind component of 5 kts from addWindComponent?

Seems to be slightly different from the A320, where the wind correction is between 5 and 15 kts. On the A380 with A/THR on and 45kts headwind, it seems it can be VLS+20 (if I interpret my references correctly)

[flogross89]

Update: Sorry for the confusion, I looked in the OIT calculations instead of the flight envelope part. Your implementation is correct, I'll approve it. Since it's such a small change, we don't need QA.

[flogross89]

@Waveif Before merging, could you please add a changelog entry?

[Waveif]

Sure thing

[flogross89]

Sure thing

Thanks! Merging now.