"Robert M. Gary"
groups.com:

In most planes your entire let down is done with engines at idle. Some
planes (like the MD-80) automatically increase their idle thrust after
the gear is down (to allow for quicker go arounds). That extra thrust
makes it even more difficult to manage the energy created from the let
down. Slowing down is always the hard part. Gliding shouldn't be.


Big difference between idle and a windmilling engine, though. And actually,
the incresed idle speed is mainly for the engine's own sake (preventing
flameouts) and on the CF6 it's because the thrust bearings don't like being
pushed !


Bertie

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