ISSUE DESCRIPTION
For piston engines, the real-life “best mixture curve” (percentage of mixture vs altitude) is very different from the one in MSFS 2024.
FREQUENCY OF ISSUE
Permanent feature.
REPRODUCTION STEPS
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Having flown for weeks MSFS 2024, and watched the frequent wrong-mixture messages, I now flew quite a few piston aircraft, disconnecting my quadrant, and assigning MSFS 2024 command “SET BEST MIXTURE” to my keyboard letter F. This way, by just flying aircraft at steady different altitudes, I was able to see on the panel the mixture percentage MSFS 2024 deems best for all altitudes
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I tested 9 different aircraft. The “MSFS 2024 best” curves I obtained were virtually identical, to ave. differences of about 1%.
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Finally, I tested reconnecting my Saitek Quadrant and flying aircraft at all possible altitudes following the best MSFS curves shown below. Engine run smoothly, no mixture-error messages. This verifies that my measurements were correct.
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For Comparison I had Gemini AI producing an average real-life curve, compared it to other curves, checked the exponential formula used by Gemini. The “Real-life Aspirated” curve below is therefore an average.
My SETTINGS
- State of the art desktop PC professionally assembled a year ago.
- Direct-fibre modem tested at 2.4Gbps.
- MSFS 2024 Aviator edition, purchased from Microsoft Store, kept updated, with no addons whatsoever. No Developer mode.
- For the “SET BEST MIXTURE” measurements obviously I disconnected joysticks.
- For normal flight I use a standard Saitek Quadrant, calibration checked to 1% error.
- I also use a Thrustmaster Warthog, but this is irrelevant to this matter because none of its axes are connected to engine running in MSFS 2024.
MEDIA
I attach screenshot of the final chart from my spreadsheet. The curves MSFS are averages among different aircraft, with negligible discrepancies. Please note that I am a top-qualified statistician and have decades of experience with flight simulators on personal computers.
