Safran Landing Systems

Safran Landing Systems UK Ltd

Jean-Yves Ravel

Jon Smith

Yann Simmonneaux

Jérôme Gui

Christophe Devillers

Antoine Guidoux

The invention relates to an aircraft undercarriage provided at its bottom end with a rocker arm () carrying at least two axles (), including one in front of a hinge between the rocker arm and the undercarriage and the other behind said hinge. According to the invention, one of the axles is fitted with one or more braked wheels () and the other axle is fitted with one or more motor-driven wheels ().

Aircraft undercarriage with braked and motor-driven wheels

A method of monitoring the condition of an aircraft landing gear shock absorber, the shock absorber including at least one spring chamber containing a gas, the method comprising taking a plurality of measurements of the gas pressure and temperature, each gas pressure and temperature measurement pair being taken of at the same instant relative to an operating cycle of the shock absorber; calculating, based on each pair of gas pressure and temperature measurements, a first value; storing the first value in a log; determining a value trend based on the log; and in response to determining that the value trend is outside a first range of values, generating a first notification signal.

Trend monitoring of a shock absorber condition

A bogey undercarriage having at least two axles, each carrying at least two wheels, wherein at least one of the axles carries a wheel fitted with a rotary drive device and no brake device, while the other wheels are provided with brake devices and no movement devices is provided. A braking method applied to such an undercarriage is also provided.

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Vélizy-Villacoublay, France

Jean-Yves Ravel