Flat rating and de rating
There are several turboprop and turbofan engines on current transports that
are flat rated or de rated.
For example the CF6-80 engine on the C5M is de rated to 50,000 pounds of thrust.
Back tracking a little, I understand that flat rating limits power at sea level but allows this same power to be maintained to a much higher altitude.
Two part question, does the de rate on the C5M allow, like flat rating for sea level thrust to be held to a higher altitude and how is this actually achieved as the aircraft climbs ?