Patent ID: 8894008

Claim:
A landing gear for an aircraft capable of landing vertically, the landing gear comprising at least one undercarriage, the undercarriage comprising a landing gear leg carrying at least one wheel, wherein the undercarriage comprises: a retraction actuator connected to the landing gear leg and provided with an electric motor for moving an extendable actuator rod of the retraction actuator relative to a cylinder of the retraction actuator between a landing gear retracted position and a landing gear extended position, for the purposes of extending the wheel from a wheel bay and for retracting the wheel into the wheel bay; a fail-safe brake connected to the actuator rod for preventing movement of the actuator rod relative to the cylinder during a normal mode, and for enabling the extendable rod to be positioned in the extended position by gravity during an emergency mode; a first sensor for monitoring the operation of the retraction actuator, the first sensor being connected to a display for indicating the position of the retraction actuator and for indicating one of the normal mode or malfunction mode of the fail-safe brake; and a first controller for controlling the retraction actuator, and a second controller for controlling the fail-safe brake.