POROUS LAMINATE
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Abstract
A POROUS SHEET ADAPTED FOR TRANSPIRATION COOLING, AS IN TURBINE BLADES, IS MADE UP OF PLURAL LAYERS OF METAL BONDED TOGETHER WITH BOSSES PROJECTINJG FROM THE SURFACES OF THE LAYERS TO CREATE A SPACE OR PASSAGE BETWEEN LAYERS AND WITH PORE THROUGH THE LAYERS, THE PORES IN EACH LAYER BEING OUT OF REGISTER WITH THOSE IN THE ADJACENT LAYER OR LAYERS. THE PORES EXTEND THROUGH THE SIDES OF THE BOSSES THUS REDUCING THE MASS OF THE BOSSES AND FACILITATING CONTROL OF THE PERMEABILITY OF THE SHEET.
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