Actuation for landing gear landing-gear system offering

Actuation for landing gear is a landing gear actuation offering from Liebherr-Aerospace, covering the extension and retraction of the gear and the steering actuation that goes with it. It belongs to the maker's complete landing gear systems, which Liebherr designs, manufactures and services at its site in Lindenberg, Germany.

Systems for landing, braking and steering are what allow an aircraft to operate safely on airport infrastructure. The actuation part moves the gear between its stowed and deployed positions and, where specified, steers the nose gear on the ground. Liebherr offers it together with the other elements of a gear installation: structural parts, position and warning systems, wheels, brakes, sensors and cockpit controls.

For the integrator, the maker lists retraction and extension systems and landing gear sub-systems as separate solution groups, and also thrust reverser actuation systems. An example of the technical direction is a nose landing gear electro-hydrostatic actuation system, designed for integration into more electric aircraft architectures.

The structural side of a gear installation covers main fittings, sliding tubes, side stays, locking stays, wheel axles and drag braces, which Liebherr designs with layout, stress and fatigue calculations and safety and reliability assessments. Liebherr states that its landing gear know-how also applies to unmanned vehicles, and it works across commercial aircraft, business jets, helicopters and defense platforms. Qualification, loads, attachment geometry and actuator ratings follow the selected aircraft configuration, and Liebherr supports development and integration with its own test and support facilities.

Typical applications are retractable landing gear of regional and commercial aircraft, helicopters such as the AW139, for which Liebherr developed and manufactures landing gear equipment, and the two integrated systems on both versions of the A220.