Abstract: A method for manufacturing a hot side regenerator cross arm seal assembly having a thermally stablilized wear coating with a substantially flat wear surface thereon to seal between low pressure and high pressure passages to and from the hot inboard side of a rotary regenerator matrix includes the steps of forming a flat cross arm substrate member of high nickel alloy steel; fixedly securing the side edges of the substrate member to a holding fixture with a concave surface thereacross to maintain the substrate member to a slightly bent configuration on the fixture surface between the opposite ends of the substrate member to produce prestress therein; applying coating layers on the substrate member including a wear coating of plasma sprayed nickel oxide/calcium flouride material to define a wear surface of slightly concave form across the restrained substrate member between the free ends thereon; and thereafter subjecting the substrate member and the coating thereon to a heat treatment of 1600.degree. F.

Abstract: A regenerator assembly for a gas turbine engine includes a center driven rotatable matrix with a hub and drive shaft including a sprocket fixedly secured thereto with a roller chain driven thereacross by means of a cross shaft assembly including a first elongated tubular coupling telescoped with respect to a low rate torsion spring bar and wherein an input shaft connected to one end of the torsion spring bar is associated with damper means including first and second relatively movable parts connected in parallel to the torsion spring bar by the coupling and operative to damp oscillations in said matrix disc drive shaft during operation of the regenerator assembly.

Abstract: A matrix disc for a rotary regenerator heat exchange apparatus includes a pair of spirally wound sheets, a first sheet having a continuously formed sinusoidal corrugation having a pitch dimension that accomodates thermal expansion in the strip. The first sheet is juxtaposed against a second corrugated sheet having a plurality of axial spaced corrugated segments therein having a pitch to accomodate thermal expansion and wherein each segment is interconnected by a plurality of elements including flat side wall segments having an axial length greater than the pitch dimension of abutting corrugation of the adjacent first strip and including a diagonally directed segment therebetween to space the corrugated segments of the second strip away from the first strip to define a plurality of generally rectangularly configured air form fluid flow paths in the matrix disc.