744F Performance ?

[stilton]

The FAI recently declared the C5M (with new uprated CF6 Engines) broke several time to climb records including a brake release to FL390 with a 80,000kg payload in 24 minutes.



Any ideas on how the 744F with a similar payload would compare ?

[CR2]

Hard to compare without knowing it's take-off weight compared to mtow. 80T payload with a small amount of fuel or with a large amount? Big difference.

744-wise did sea-level to 450 with about 20T cargo and 25T fuel in 18 mins. Not that we were in a hurry trying to set a record.

[413X3]

FL450? The recommended is 430 right? How often do you go that high?

[flite idol]

Not aware of a recomended altiude. There is an optimum altitude based on gross weight etc. Maximum altitude is FL451.

[742]

B744F with B5F engines. 160,000 kg BOW, 80,000 kg payload, 30,000 kg of fuel for a 270,000 kg takeoff weight. 16 minutes to FL390 at ISA.

[CR2]

Why go to 451? depends on whose bean-counting rules you're using. CFP says 451, no particular reason not to agree with CFP/PLOG/Flightplan ... 80 mins sector, 744-wise near as dammit empty.