Safran Helicopter Engines

Jean Michel Bazet

Romain Thiriet

Jean-Luc Charles Gilbert Frealle

Pierre Darfeuil

The invention relates to a method for controlling an emergency device of a helicopter, said helicopter comprising a rotor suitable for being rotated, said emergency device being suitable for supplying additional emergency propulsion power to the helicopter, in said method comprising a step () of measuring the rotation speed of the helicopter rotor, a step () of calculating the drift of the measured rotation speed, a step () of continuously verifying conditions such that the speed of rotation of the rotor is higher than a predetermined value, referred to as arming speed, and the drift of the rotation speed is lower than a predetermined value, referred to as arming drift, and a step () of activating the emergency device if the verified conditions are validated.

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Moissy-Cramayel, France

Jean Michel Bazet