B777 Holding Altitudes
Hello All.
I was having a look at the Holding table in the FCOM and came up with the following:
It seems the heavier the aircraft is, the lower fuel flow per engine is achieved at a LOWER altitude. i.e 240T-15000ft-3350, 220T-20000-3050 etc. Now I thought if you were going to hold you'd be better off holding as high as you can provided you're not way above optimum. Only at 160T do we get up to 30000.
These numbers are for a -200 and the same principle applies on the -300 table-just the numbers are different obviously.
Now, either I'm missing something or I've forgotten some theory I should know, but I'm not sure if I understand this!?
Any ideas?