four engines rather than twins
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As a side note, 3 or 4 engine aircraft have better performance figures for maximum loads out of high/hot environments as well as shorter runways than your average 10000+ foot one at the major hubs. Having 3 or more engines also removes the necessity for having/maintaining ETOPS capability.
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Also freighters tend to operate to a variety of destinations, some are remote and not well equipped, and in the event of engine problems it is a great advantage (cheaper) for a 4 engine aircraft to 3 engine ferry to a maintenance base.
Join Date: Feb 2001
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why do freight companies tend to operate four engine aircraft rather than twins, even though they carry the same load ?
777F just entered the market so in 10-15 years this will change.
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The MD-11 and 747 don't carry the same load, though...
The B777 had to have a few modifications to it to be able to carry the same load and be more efficient as the MD-11 like 2 115k thrust engines as opposed to the 2 90k engines on the original -200. The MD-11 has 3 62k engines and as stated above can be easily ferried with one out.
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Does anyone actually do 3 engine ferry in 4 engine aircraft these days?
Last attempt I heard of was an "Asian" carrier attempting it and ending up very quickly in the grass
(and that was quite some time ago).
Last attempt I heard of was an "Asian" carrier attempting it and ending up very quickly in the grass
(and that was quite some time ago).
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BA does regularly with its 747-400s. Once or twice a year.
No big deal.
Captain has to be qualified 3- Eng Ferry, which is a few hours in the sim and a bit of reading.
Only legislative issue is some countries will not allow you to operate from certain airports / runways.
ATB
Pete
No big deal.
Captain has to be qualified 3- Eng Ferry, which is a few hours in the sim and a bit of reading.
Only legislative issue is some countries will not allow you to operate from certain airports / runways.
ATB
Pete
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Still 3 engine ferry the Electra on the rare occasion an engine gets toasted.
JetPhotos.Net Photo » G-LOFE (CN: 1144) Atlantic Airlines Lockheed L-188C Electra by Tiago Palla
JetPhotos.Net Photo » G-LOFE (CN: 1144) Atlantic Airlines Lockheed L-188C Electra by Tiago Palla
The B777 had to have a few modifications to it to be able to carry the same load and be more efficient as the MD-11 like 2 115k thrust engines as opposed to the 2 90k engines on the original -200. The MD-11 has 3 62k engines and as stated above can be easily ferried with one out.
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Why would you compare a 777F with a 747 conversion? Why not compare it with a 747F?
I'm not so sure that the 777F does all that is claimed for it, now that Thai cancelled their 777F contract with Southern Air...
I'm not so sure that the 777F does all that is claimed for it, now that Thai cancelled their 777F contract with Southern Air...
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Also, the new -8 74 burns LESS fuel (over 400 gallons less per hour) than the 777 and carries a significantly larger payload. Not to mention that e-tops does not come into play, and if you loose an engine you sill have 3 over the middle of the pond! If I am going across the Pacific or the Atlantic I want 4 engines thank you very much!!
Why would you compare a 777F with a 747 conversion? Why not compare it with a 747F?
I'm not so sure that the 777F does all that is claimed for it, now that Thai cancelled their 777F contract with Southern Air...
I'm not so sure that the 777F does all that is claimed for it, now that Thai cancelled their 777F contract with Southern Air...
Also, the new -8 74 burns LESS fuel (over 400 gallons less per hour) than the 777 and carries a significantly larger payload. Not to mention that e-tops does not come into play, and if you loose an engine you sill have 3 over the middle of the pond! If I am going across the Pacific or the Atlantic I want 4 engines thank you very much!!
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Maybe I'm old, but four engines with a PFE onboard is my preference. Nice to have the A&P qualified PFE when you need him for a mechanical at some third world, watering hole charter destination.
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Maybe I'm old, but four engines with a PFE onboard is my preference. Nice to have the A&P qualified PFE when you need him for a mechanical at some third world, watering hole charter destination.
As for FedEx wanting more 777's, remember that Fedex and UPS both carry small packages for the bulk of their load. Therefor, they cube out the aircraft way before they have to worry about weight.
As for the numbers on the -8, I was in a meeting three weeks ago with the V/P of flight operations. The number that was given is 437 gallons less per hour than the 777 so I think they must know if they are being that specific. Seeing that we have over 20 -8's either on order or optioned, I think that Boeing is giving us real numbers.