Astuteman From United Kingdom, joined Jan 2005, 9604 posts, RR: 97 Reply 2, posted (4 years 1 day 3 hours ago) and read 4469 times:
Quoting Starlionblue (Reply 1): As I recall the 380 uses way less fuel than a 747-100/200. Compared to the 747-400, I'm not sure, but even if they are on par that means the 380 "wins" due to higher payload.
It's fairly widely believed that typical A380's in service today are using 7%-8% more fuel than a 744.
I would think that would result in lower fuel burn than a 747-100/200, but I don't know.
Astuteman From United Kingdom, joined Jan 2005, 9604 posts, RR: 97 Reply 4, posted (3 years 12 months 2 days 6 hours ago) and read 3911 times:
Quoting Starlionblue (Reply 3): Can't be bothered to look up the exact numbers, but AFAIK the 380 has more than 8% more payload than a 744 so it "wins". Correct me if I'm wrong here.
Depends on what the payload is.
In pure weight terms, the A380 carries about 186k lb compared to 154k lb for the 744 - an increase of 21%.
But in passenger capacity terms, the A380's cabin is 49% bigger than the A380's.
Of course when both are configured 10-across, the seats on the A380 will be bigger.
So you could argue that it can carry, say, 40% more passengers in a similar configuration to the 744, but with the A380 passengers having 9% more space each.
So 21% more weight, or 40% more pax, each with 10% more space.
For c. 8% fuel burn delta (soon to drop by another 2% of course.. )
Sounds like a reasonable return
And that analysis doesn't consider the A380's much greater range capability.
Past 6 000Nm air range, the payloads skew considerably towards the A380.
At 7 500Nm air range for example, the base A380 carries about 145k lb vs about 66k lb for the 744.
The "2012" spec A380 will increase that payload at 7 500Nm air range to about 160k lb, about 2.4X the 744..
Lowrider From United States of America, joined Jun 2004, 3220 posts, RR: 10 Reply 6, posted (3 years 12 months 1 day 22 hours ago) and read 3784 times:
I have no idea what the A380 burn numbers are like, but very rough rule of thumb rules for the 74 classic (used to do a reasonableness check on the planned numbers) is approx 30k lbs of fuel for each hour of flight. Some hours burn you burn more than others, and this number also factors in typical holding and reserve fuel, but the A380 would need that too. So on a planned 7 hour flight, I would look for about 210k lbs on the release. Anything different would be cause for investigation.