Abstract: The invention resides in a carbonaceous aircraft brake disk having a reuseable lightweight carbon composite center core to which can be bonded lightweight composite wearing materials to each side. The wearing surface is particularly designed for wear loading applications, and is relatively thin thereby simplifying manufacturing and quality assurance steps. The center core is designed for long life and strength at relatively low cost. A carbon felt layer saturated with an adhesive is located between the center core and the lightweight side wear materials to form an integral disk upon pyrolizing of the adhesive.

Abstract: The invention is designed to produce a more economical means of closing drilled passage holes in hydraulic and/or pneumatic systems either during manufacture and/or repair. The process involves pressing a ball, or diametral portion thereof, with a diametral interference fit, and of similar material as the parent part to be sealed, into the drilled hole causing a seal of the hole by relying on the curvature of the surface of the ball or plug to plastically deform and maintain a depressional diametral seal within the elastic limits of the seal and the parent material for sealing, and then crimping the parent material to be sealed over the end of the ball or plug to maintain it in position against pressure blow out. Alternate methods of holding the ball in position might include a line spot fusing utilizing a current passing through the ball to make the bond permanent, or a ring furnace fusing and/or other such fusing and partial staking procedures to bond the ball in place as an integral part of the unit.

Abstract: An anti-skid and brake control system for use on an aircraft wherein the output signals from standard anti-skid circuitry are combined with the signals from a brake pedal transducer to create braking signals. The braking signals are applied to current controlled hydraulic valves for regulation of the application and release of brake pressure. The brakes utilized are dual cavity brakes with corresponding cavities of all brakes being interconnected to the same hydraulic line. Shut-off valves are interposed in the hydraulic lines and are operative to enable the brake valves to regulate brake pressure when either brake pedal of the aircraft has been depressed a fixed amount. Biasing circuitry is presented to affect the brake signal in such a manner as to overcome a dead band within the response characteristics of the brake valves utilized.