ram-air turbine


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ram-air turbine

n
(Aeronautics) a small air-driven turbine fitted to an aircraft to provide power in the event of a failure of the normal systems
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It features three independent systems powering the primary flight controls and derives power from engine-driven, electrical and ram-air turbine pumps.
The company signed a memorandum of understanding in May to supply the C919's auxiliary power unit and ram-air turbine doors, and expects to sign a firm contract for the work by the end of the year, says Xizi research academy's senior aeronautical engineer Tan Wu.
She was inspecting the ram-air turbine (RAT) cavity, when she noticed that the RAT dump valve (part of the pneumatic system and similar to the buttons checked during preflight on the main landing gear) was open.
We knew if we pulled the ram-air turbine (RAT) to restore electrical power, we would lose all electrical power in the wires.