tdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 80
Reply 4, posted (2 years 4 months 2 weeks 11 hours ago) and read 6067 times:
Quoting rc135x (Reply 3): This is very helpful for US airlines, but I am wondering about the airline that uses the most fuel. I should have been clearer in asking for worldwide data.
Someone perhaps like Emirates or British with an extensive international long haul route? Or maybe even Delta just with total traffic.
I think it has to be one of the US carriers...the top three in the world by RPK are United, Delta, and American. Emirates is fourth but they're at about half the output of United. Long-haul international carriers will tend to have much better fuel-per-RPK because they're using larger, more efficient aircraft that spend a lot of time at efficient cruise. So, if anything, RPK should under-represent fuel burn for United/Delta/America relative to someone like Emirates.
Flighty From United States of America, joined Apr 2007, 8948 posts, RR: 3
Reply 8, posted (2 years 4 months 1 week 6 days 8 hours ago) and read 5749 times:
Quoting tdscanuck (Reply 4): So, if anything, RPK should under-represent fuel burn for United/Delta/America relative to someone like Emirates.
Yes, RJs get about 40 ASM per gallon while long haul craft get about 60 ASM per gallon. The most efficient aircraft are mid-haul stretch narrowbodies such as 739ER, A321 and 753. Those can occasionally reach 80 ASM per gallon. It makes sense because these have much greater density and lower structural weight per passenger, while they still spend 3-4 hours at cruise.
I have never seen anything reported to get 100 ASM per gallon. Maybe it will be achieved with comfort someday.
The greatest fuel burners are the big 3 American carriers, yes. We Americans are still big over-achievers in this area, although the margin is not as great as previously