|Quoting 747fan (Reply 1):|
2-spool compressor, I believe, which makes it more suitable to transcons in terms of fuel burn than the CFM)
Correction: I meant 2-stage high pressure turbine, which allows the HPC compressor to do more work, translating into slightly better fuel efficiency (about a 2% fuel burn advantage for the V2500). Overall, the IAE's are the better suited for "longer haul routes" (transcons - think B6
), while CFM's are the better engines for short hops (think WN
w/ their 737's, US w/ their A319 east coast shuttle). One other IAE advantage is that it burns less oil than the CFM. An advantage for the CFM is reliability - I don't know about the IAE's reliability track record, but the CFM56 is among the most reliable and durable jet engines ever built (along w/ the JT8D), hence its popularity and 25-year service run (so far), with it still using the same design.