Abstract: A regenerator cross arm seal structure for a rotary regenerator of a gas turbine engine includes a cross arm seal extending diametrically of a matrix of the rotating regenerator which includes a center bore therein for a drive bushing and spindle; the seal having a leaf spring on one surface thereof that is engageable with an engine block support platform to seal between the engine block and one surface of a seal platform that supports a cross arm wear face with a hub section cooled by leakage of air through the center bore and the seal wear face including a material with low friction and good wear characteristics when operating at elevated temperatures between 1000.degree. F. to 1500.degree. F. (523.degree. C. to 800.degree. C.

Abstract: A regenerator seal assembly for use in a rotary regenerator includes a two-stage seal with a peripheral rim seal having a seal leaf turned inside out so that the free end of the leaf is of a smaller radius of curvature than the fixed end of the leaf and wherein the outer peripheral rim seal is made up of a plurality of straight leaf segments formed on chord lines along the outer circumference of the seal assembly with each straight leaf segment being joined by a mitered joint so that the free end of each such leaf segment is deflected without formation of waviness of wrinkles in the seal assembly.