Originally Posted by
luckypierre
The 777 does have a RAT which is not fuel dependent and presumably would attempt to supply electrical power until the plane struck the sea. I dont know how power is allocated from the RAT, but presumably flight deck systems would receive a high priority.
The RAT also has to power all of the electrical flight control surfaces, as these are all electric (fly by wire) and not hydraulic on the 777. I suspect the RAT on the 777 is fairly powerful.
The
Gimli Glider is an example of how the RAT can be used to land an aircraft.