Re: "Astana is 3800 Miles or so. Kerguelen Island is 4000 'ish miles on a rough extrapolation of the Southern arc. Is is feasible? Vallee des Sables would be a lovely quiet place to put down?"
With various altitudes and maneuvers of course affecting it, CNN meterologist Chad Myers today has suggested that destinations up to 3000 miles away are the most reasonable realm of possibility, based upon available fuel.