wind) at Mach .8= I'm planning to slow to .78 Mach in order to get 8+30min hang time in order t= land in STT with good fuel reserves, I will depart Paris Full fuel 29,000lbs,.,(the 550 holds 41,500lbs of fuel, f=i). G550 would run this route at .85Mach with a flight time of 7+55min. We will run at .78 Mac