744 Speed Control
I recent thread that has been discussing ATC speed control has got me thinking about the 747-400.
If we take LHR where speed control normally goes something like 250-220-180-160/4D, how do crews handle the the lengthy time required to extend from flaps 1-5? Correct me if I'm wrong, but with average weights, min clean speed is something in the region of 220-230 kts. When instructed to reduce to 180KIAS this would normally require flap extension from 1-through to 10. Do ATC just accept that it will take a 744 a while to reduce in this speed range, or do crews anticipate this by having flap 5 selected at the 220kt mark?