EMERGENCY RAM AIR TURBINES

In terms of design, they consist of a turbine itself, a control system and a deployment system, and depending on the specific embodiment, they might have a bevel gear, a drive shaft, a high-pressure pump and/or a generator.

At the customer’s request, the system can be equipped with an electric generator or hydraulic pump, or include both of them in case of a hybrid RAT.

The VD-004V RAT is the most widespread representative of this class of units.

In emergency situation, the wind-powered turbine is deployed into the external air stream and drives the variable displacement hydraulic pump providing airplane’s central hydraulic system with power at flight speeds from 250 to 730 km/h.