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AFAIK the 757 frame is too heavy to be powered by the LEAP engines. Those planes were powered by a class of engine between the old 737 and 777 engines, and nobo
by winstonp 1y ago
AFAIK the 757 frame is too heavy to be powered by the LEAP engines. Those planes were powered by a class of engine between the old 737 and 777 engines, and nobody makes them anymore because they're not in demand, so a 757 MAX is just not financially viable.
- rawgabbit 1y agoThe article said Boeing is talking to Rolls Royce for the new plane. American Airlines used to have a fleet of 757s powered by Rolls Royce engines assembled in Montreal Canada. I used to work on those engines many many years ago.
- selectodude 1y agoYou can use the most powerful LEAP engine on a lightened 757 “neo”, it’ll just be a complete dog like the A321 and not a rocket ship like the old one.
- KerrAvon 1y agoJust ‘cause I’m totally ignorant about this stuff: why is that?
- quibono 1y agoThe A321 is an elongated/bigger version of the A320. Similarly to the B737 - which also went through this process a few times (e.g. compare the B737-400 vs B737-600 vs B737-MAX) - it means the engines are moving a heavier&bigger plane.
- rawgabbit 1y agoThe 757 was powered by rb211-535e4 which had about 40k pounds of thrust each. https://www.rolls-royce.com/products-and-services/civil-aerospace/narrowbody-and-regional/rb211-535e4.aspx https://www.rolls-royce.com/products-and-services/civil-aero... The 737 MAX is powered by CFM LEAP which has about 30k pounds of thrust each. https://www.cfmaeroengines.com/leap https://www.cfmaeroengines.com/leap