Abstract: A turbine engine heat exchanger has: a manifold having a first face and a second face opposite the first face; a plurality of first plates along the first face, each first plate having an interior passageway; and a plurality of second plates along the second face, each second plate having an interior passageway. A first flowpath passing through the interior passageways of the first plates, the manifold, and the interior passageways of the second plates.

Abstract: A turbine engine heat exchanger has an array of heat exchanger plates mounted to an inner case wall for providing heat transfer from a bleed flowpath to a bypass flowpath. Each plate has: first and second faces along the bypass flowpath; a proximal edge mounted to the inner case wall; an inlet along the proximal edge; an outlet along the proximal edge; and a branch segment of the bleed flowpath passing from the inlet to the outlet.

Abstract: An eyeglasses and headgear combination is disclosed. The eyeglasses may be worn alone or in combination with the headgear. The temple member of the eyeglasses is alternatively positionable behind the ear of the user or attached to the headgear. When the temple is attached to the headgear, the temple extends outward from the front of the eyeglasses at an angle different than when the temple is positioned behind the ear of the user. This provides maximum comfort for the user in both positions. The coupling to which the temple is attached may be pivoted to move the eyeglass lenses out of the user's field of vision and rest them on his head or headgear.