Airbus Helicopters

Eurocopter

Régis Rossotto

Guillaume Dumur

Emmanuel Camhi

Hilario Vieira

Hanno Boie

Jean-François Piccone

A control method for controlling an overspeed safety system () of an aircraft () having at least a first engine () and a second engine (), during which method an engine is shut down when a monitoring parameter of that engine exceeds a first threshold, and another engine distinct from this engine is shut down when the monitoring parameter for said other engine exceeds a second threshold, said second threshold being greater than said first threshold.

Control method for an overspeed safety system, and an associated system and aircraft

In order to regulate a power plant () having a gas generator () and a free turbine () to drive a rotary wing, a first speed of rotation (NTL) of the free turbine () is regulated on a first setpoint value (NTL*) equal either to a regulation term (NRc) or to a predetermined setpoint threshold (NTL*). The regulation term (NRc) is a function of a third speed of rotation (NR) of said rotary wing in accordance, where NRc=NR*(1&#x2212;d), 'd' representing a non-zero constant lying in the range 0 to 1.

Passing from a non-synchronized state between an engine and a rotor to a synchronized state

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Marseilles, France

Régis Rossotto