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“ … A RAT, or Ram Air Turbine, is just a small fan that normally sits stowed
inside the airframe. When primary power is lost, it swings into the
airstream and spins, converting airflow into usable power.
Depending on the aircraft, that rotation drives a hydraulic pump, an
electrical generator, or both.
The output is limited, so you can’t fly the aircraft like nothing happened.
The RAT supplies power only to essentials such as flight controls and
core avionics. This lets the crew maneuver the aircraft, navigate,
communicate, and land safely in an emergency.”
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I learned something new today, thanks!
Don’t they have an APU any longer? That little beanie head propeller thing doesn’t look like it would provide much juice, to be honest.