Hi Guys , just to put it into context , the rough hourly cost of running a civ B747-400 is in the region of £10,000 per flying hour , at current exchange rates of course , this includes maint , crew etc... everything. It is based on an aircraft approx 8 to 12 years old and flying 350 to 400 hours per month , less hours the hourly cost would increase , maybe the high cost of military aircraft is low flying hours?