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by selectodude 259 days ago
You 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.
1 comments
KerrAvon 259 days ago
Just ‘cause I’m totally ignorant about this stuff: why is that?
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rawgabbit 259 days ago
The 757 was powered by rb211-535e4 which had about 40k pounds of thrust each.

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

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quibono 259 days ago
The 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.
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