Hi. I was wondering about the wings of the 747 classics, as well as its ability to climb fully loaded. I was told that the wings of the 747 classic by comparison to the -400 were much heavier and that a longer takeoff roll was required as a result. What I don't know about the 747 at all for any of its models is how well it climbs...I know that in terms of cruise speed it is among the best performers in that area. Did the classics climb like the A340, or was it better?
I'm also curious as to why the first giant jetliners had such narrow wingspans compared to today's. The L-1011, DC-10, and 747 all featured sharply swept wings whose spans were not any greater than the 777. In fact, the 747 classic wingspan was a bit shorter than the 772!