Originally Posted by
DesiPilot
Another rule of thumb that we used was
TAT= SAT + (TAS/100)^2.
It works pretty well for approximation.
True enough, an approximation. If you want the exact figure with Knots TAS as the entry variable -
TAT= SAT + (TAS/87.1)^2, which is exact
Or, if your entry variable is Mach Number -
TAT= SAT + (1+.2*M^2), which is also exact
Prop operators may prefer the former, jet jockeys the latter.
Regards,
Old Smokey