The GH has a wingspan about that of a 727, and flies up to 65,000', with a mission time of a couple of days.

I was recently reading about a new UAV, with the wingspan of about a 747, that flies up to about 85,000', and has a mission time of about 12 days. Trying to find more info now, but so far no luck....read about it some months ago.

cliff
HSV