QNH and Wind Tolerances
Slightly off topic, but could not find answers to these couple of questions?
QNH (Altimeter) tolerances for a RTOW calculation. If I am lined up to go and the altimeter setting drops 1 mb, am I covered? My company uses a 2 mb tolerance for reduced thrust TO, but is there a required tolerance for Max Thrust TO calcualtions?
Also I recall from Perf A that the headwind is factored by 50% and the tailwind by 150%. So what does this really mean. (ie what if I have 10 knots vs 0 knots?)