Abstract: Low-velocity axial impact thrust on a bonded telescoping middle joint of a strut is retarded and impact energy is converted and absorbed by the elastic strain of unfettered circumferentially bands. In a preferred embodiment an impacted strut regains structural integrity after impact displacement and fracture by re-bonding.

Abstract: An aircraft pneumatic cabin pressure control system that is adapted to prevent the difference between cabin pressure and atmospheric pressure from exceeding a threshold value wherein the threshold value varies in relation to aircraft altitude. In some instances the control system includes at least one outflow valve adapted to prevent the difference between cabin pressure and atmospheric pressure from exceeding a threshold value, and the control system is adapted to override the outflow valve at predetermined altitudes. The control system may implement a method for controlling the cabin pressure of an aircraft using a pneumatic cabin pressure control system that includes an outflow valve comprising at least two pressure input ports, the method comprising coupling an isolation valve to an input port of the outflow control valve and utilizing the interrupt valve to isolate the outflow valve input port to which the isolation valve is coupled from pressure changes.

Abstract: One embodiment relates to a modular cabin pressure regulator that can receive its destination parameter and control settings from an avionics system or a manual selector and display. The modular pressure regulator includes a removable selector, a controller, and a monitoring unit to control an electro-mechanical actuator driven valve. Such modular design allows a single unit to be used for the cabin pressure selector and display, controller, and monitoring functions. In one embodiment, the selector module can be bypassed or removed and the same pressure regulator design can provide the controller and monitoring functions to send and receive inputs from an avionics system. This embodiment can be mounted directly on the electro-mechanical actuator driven valve or elsewhere on the aircraft.