Originally Posted by
KC10 FATboy
Are you sure this is correct? Mach is the ratio of the speed of an object through a medium / speed of sound. The speed of sound is variable with temperature. Thus, at different temperatures, the IAS will be different.
Since I've never paid attention to the IAS speeds for each individual MACH number, I really don't know. Perhaps the temperature is / was almost always the same when you noticed this?
Yeah, Mach vs. AS is a function of air DENSITY. Density varies with ALT, Temp, barometric pressure, and humidity.
In the real world, from day-to-day you would expect slight differences in Mach vs. AS.
A real ADC would constantly calculate mach and airspeed pretty much instantaneously. Sounds like a game-ism to me.