An aircraft undercarriage comprising a shock absorber further comprising first and second portions that are mounted to slide telescopically relative to each other and that can come into internal abutment in the event of the shock absorber being compressed, the undercarriage being fitted with a detector device for detecting the shock absorber coming into internal abutment, which comprises firstly a punch secured to the first portion of the shock absorber or to a portion of the undercarriage that does not slide relative to the first portion of the shock absorber, and secondly a sacrificial piece secured to the second portion of the shock absorber or to a portion of the undercarriage that does not slide relative to the second portion of the shock absorber, the punch and the sacrificial piece being arranged in such a manner that, in the event of the two portions of the shock absorber coming into internal abutment, the punch strikes the sacrificial piece so as to form an indentation therein.

A target steering angle determining section determines a target steering angle based on the operation amount of the steering gear. A target angle setting section sets a target angle of a steered wheel. A control state switching section switches between an enabled state in which steering control is performed to deflect the steered wheel such that an actual steering angle reaches the target angle and a disabled state in which the steering control is not performed. When the steering control state is switched to the enabled state, the target angle setting section sets the target angle to an angle that was brought closer to the actual steering angle from the target steering angle. After the steering control state is switched to the enabled state, the target angle setting section brings the target angle closer to the target steering angle as time passes.

A target steering angle determining section determines a target steering angle based on the operation amount of the steering gear. A target angle setting section sets a target angle of a steered wheel. A control state switching section switches between an enabled state in which steering control is performed to deflect the steered wheel such that an actual steering angle reaches the target angle and a disabled state in which the steering control is not performed. When the steering control state is switched to the enabled state, the target angle setting section sets the target angle to an angle that was brought closer to the actual steering angle from the target steering angle. After the steering control state is switched to the enabled state, the target angle setting section brings the target angle closer to the target steering angle as time passes.

A nose-wheel steering system is disclosed. In various embodiments, the system includes an actuator; a strut; and a gearing mechanism operably coupling the actuator to the strut, the gearing mechanism including a steering collar attached to the strut, and idler gear engaged with the actuator and a pinion having a first gear engaged with the idler gear and a second gear engaged with the steering collar.

A nose-wheel steering system is disclosed. In various embodiments, the system includes an actuator; a strut; and a gearing mechanism operably coupling the actuator to the strut, the gearing mechanism including a steering collar attached to the strut, and idler gear engaged with the actuator and a pinion having a first gear engaged with the idler gear and a second gear engaged with the steering collar.

A nose landing gear system is disclosed. In various embodiments, the nose landing gear system includes an electro-hydraulic actuator configured to raise and lower a nose shock strut assembly; a first electro-mechanical actuator configured to steer the nose shock strut assembly; and a second electro-mechanical actuator configured to open and close a fairing door.

A nose landing gear system is disclosed. In various embodiments, the nose landing gear system includes an electro-hydraulic actuator configured to raise and lower a nose shock strut assembly; a first electro-mechanical actuator configured to steer the nose shock strut assembly; and a second electro-mechanical actuator configured to open and close a fairing door.

A steering system may include a gear assembly and a collar. The gear assembly may include a planet carrier, a planet gear, an internal ring gear, and a sun gear. The planet gear may be disposed between the internal ring gear and the sun gear. The gear assembly may provide a mechanical advantage to the steering system, which may result in a greater powered steering range, a shorter rack assembly, and/or increased design space relative to typical steering systems.

A steering system may include a gear assembly and a collar. The gear assembly may include a planet carrier, a planet gear, an internal ring gear, and a sun gear. The planet gear may be disposed between the internal ring gear and the sun gear. The gear assembly may provide a mechanical advantage to the steering system, which may result in a greater powered steering range, a shorter rack assembly, and/or increased design space relative to typical steering systems.

A system and method for display of judgmental oversteering taxi data receives a plurality of parameters from aircraft, environmental, position and path sources and determines and displays accurate oversteering data to a pilot. The system enables the pilot to make a variety of taxi turns confident that all aircraft wheels remain on a prepared surface. Aircraft sources include data associated with the aircraft including whether the aircraft has steerable body gear. The environmental parameters include weather, surface friction, and additional data applicable to a turning radius of an aircraft. Position data includes GNSS data to accurately position the aircraft aligned with the taxiways. Path data includes an assigned ATC clearance as well as taxiway data associated with the assigned taxi route. The method compares each of these received variables with stored database information to ensure the aircraft maintains a safe position on the prepared surface during a turn.