11.857.
From the tail...747-100B, -200B, -300: 63 ft 5 in (19.3 m)747-400/-400ER: 63 ft 8 in (19.4 m)747-8I: 63 ft 6 in (19.4 m)
93.375
124.5
0.012
63
9
63 can be evenly divided by 1,3.7,9,21, and 63.
93.375
93.375
0.0107
63 ft 8 in to top of tail.
bulkhead seating LOCATION 747-400