Abstract: Brake discs of carbon or other porous material in which the opposed faces of the discs are provided with shallow grooves extending between the inner and outer circumferences to vent steam and other gases generated during braking. The grooves of the stationary discs may be at different angles relative to the radii than are the grooves of the rotating discs.

Abstract: A disk brake having a cylindrical drive member extending axially from one side flange of a wheel. The cylindrical drive member has axially extending keyslots which engage radially outwardly extending ears or keys on rotatable brake disks and cause the disks to rotate with the wheel. The keyslots are open at one end and have a reinforcement member bridging the open end of the keyslots to provide added hoop strength to the cylindrical drive member. The reinforcement member is preferably a circular metal band riveted to the periphery of the drive member adjacent the open end of the keyslots.

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.