Fuel Burn

[Bigt]

Prompted by the news that MK is flying again..........What is the difference in fuel burn for the 747 - 200 v 400?

Im not a cargo expert but say 40,000 kg of freight over 5000 miles for the flight

[Maeshe]

Depends whether empty or full.

Full
B744F 3400usg/hr
B742F 4200usg/hr

Empty
B744F 2700usg/hr
B742F 3000usg/hr

So, at USD4/usg that means USD3,200 per hour more for the older bird full and USD1,200 p/h empty. That's about USD0.25 per kg more expensive on a typical one-way mission....

Basically, the cost of ownership of B742F now needs to be minimal, loads and yields need to be good, otherwise it don't work..... that means only a few routes are viable, such as those Kalitta US Mail contracts and a few African routes...

[L-38]

I recall (although from hazy memory) of noting the figures of each from two flight plans. Each had approximately the same payload.

B-744 / ANC / ICN burn was 87,000kgs . . .
B-742 / ANC / ICN burn was 106,000 kgs .

[GlueBall]

Average 13% less burn at comparable payloads and sector lengths. However, there are variations by engine models. The three-spool Rollers typically burn less than the two-spool Pratts and GEs.

[Hunter58]

With 40t over 5000nm it does not matter how much you burn. You go bust due to missing revenue...!

[allblacks]

Good infomation.

Anyone know how much better the 747-8Fs will be??

Thanks

[Bigt]

Thanks for the replies.......I just grabbed figures out of the air to get some idea of the difference

[Roadtrip]

The classics are beer cans at $140 oil. The 400s are about 17% more efficient. On a 400 freighter conversion, there's about a 2% efficiency penalty over a purpose built freighter . . . which is a lot over the long haul.