From the cockpit of the dc designs f-15. I just turned the air pressure all the way up and temperature all the way down. Is this mach speed a bug or a feature?
29.92 is standard pressure. No idea what the temp is, but it does affect engine performance.
Do you know technically how?
In the same way as altitude affects it? Or does it simply just allow jet engines to fly faster?
Mach 3.7 seem a bit extreme, and I was definitely moving faster than usual.
Lower temps increase engine performance, but MSFS weather and FDMs still require quite a bit of work, especially in the supersonic regime.
Furthermore most sims are most precise around ISA conditions.
The further you deviate from ISA, the lower the accuracy.
1 Like
If you use the above calculator you will notice that at Mach 1, ISA -46°C will cause a negligible increase of only 0.1M.
Getting engine performance right at Mach 2 and at such large ISA deviations is for sure way out of the simulation range of MSFS.
Sound travels slower in cold air, so the Mach # will rise for any given TAS. You’d need to know the outside temp to get an accurate calculation.