Abstract: A double truss structural armor component includes a first face sheet, an intermediate sheet opposing the first face sheet, a first truss core member sandwiched between the first face sheet and the intermediate sheet, a second face sheet opposing the intermediate sheet, a second truss core member sandwiched between the second face sheet and the intermediate sheet, and laminate materials disposed within interior flutes of the first and second truss core members. The first tress core member has a flute axis. The second truss core member has a flute axis which is oriented in a range of about 45.degree. to 90.degree. from the flute axis of the first truss core member. Thus, a biaxially redundant load path is formed. The first and second face sheets, the intermediate sheet, and the first and second truss core members are formed of high toughness, high strength titanium alloys.

Abstract: A method for making a cooling system for reducing the temperature of an exhaust-impinged structural panel includes an upper, primary cooling panel having boundary layer film-forming openings therein, a middle, secondary cooling panel having openings for directing a flow of cooling fluid into impingement with the primary cooling panel, and a lower cooling panel. The lower and upper panels together delimit a truss structure which structurally reinforces the cooling system, and the lower panel forms with the upper panel channels for conducting pressurized fluid first to the openings of the secondary cooling panel and then to the openings of the primary cooling panel.

Abstract: A wind tunnel model support mechanism has a double gimbal arrangement coupled to the tunnel's solid string, allowing the model freedom to move in all three major axes; pitch, roll and yaw with limited movement in horizontal and vertical displacement. Such a support enables evaluation of flutter characteristics not possible during conventional fixed sting operations.