Well, Toots
Well, Toots,
If you are using -56.5 or .6 as a constant and then LSS is based on OAT anyway then the answer is that they (the speeds) are both the same. As Mach = LSS = OAT, ok?
Was that your trick question for the day or did you want the OAT to be with a temp dev (lower)(or higher) thereby giving you lower than -56.6 hmmmm? thus affecting your airspeed. Or was this without ISA, like JSA?