Abstract: A continuous strip of brazing foil is partially folded about transverse parallel fold lines in a repetitive pattern. When this strip is positioned between the nodes of honeycomb cells the fold lines will index the cells into proper alignment for assembly. The brazing strip also serves its normal function of providing brazing material for attaching the assembly to other components.

Abstract: When conventional honeycomb structures are formed into cylinders, the inner wall made up of the inner edges of the individual honeycombs is circumferentially compressed and the outer wall made up of the outer edges of the honeycombs is circumferentially stretched. As a result, the height of the inner wall increases and the height of the outer wall decreases resulting in a bowing in of the central portion of the cylinder so that the cylinder assumes an hourglass shape. This bowing in can be avoided by corrugating the original ribbon core material in the manufacture of the honeycomb in such a manner that one longitudinal edge of the corrugated ribbon follows a wave form of an amplitude greater than the wave form defining the opposite longitudinal edge.

Abstract: When conventional honeycomb structures are formed into cylinders, the inner wall made up of the inner edges of the individual honeycombs is circumferentially compressed and the outer wall made up of the outer edges of the honeycombs is circumferentially stretched. As a result, the height of the inner wall increases and the height of the outer wall decreases resulting in a bowing in of the central portion of the cylinder so that the cylinder assumes an hourglass shape. This bowing in can be avoided by corrugating the original ribbon core material in the manufacture of the honeycomb in such a manner that one longitudinal edge of the corrugated ribbon follows a wave form of an amplitude greater than the wave form defining the opposite longitudinal edge.

Abstract: Rather than spray coat face sheets of honeycomb panels with powder braze alloy or using foil strips of braze alloy between honeycomb core and face sheets, individual ribbon segments of brazing foil are positioned between successive honeycomb cell vertices or nodes. The arrangement is such that several such ribbon segments will lie essentially in parallel planes to each other and normal to the planes of the top and bottom panel sheets when these panel sheets are positioned to sandwich the honeycomb cells therebetween. Heat can then be applied to melt the ribbon segments resulting in a flow of the brazing material into the nodes as well as the contact line joints made between the top and bottom of the cell walls with the top and bottom panel sheets. Excess brazing material on the panel surfaces covering the open cell portions free of joints is thereby virtually eliminated and desirable ductility and elongation characteristics of the resulting structure are retained.

Abstract: The vane structure fits within a side opening of an aircraft jet engine normally covered by a pivoted clam shell arrangement. When the clam shell arrangement is actuated, it swings from the side opening in a direction to intercept thrust gases normally passing rearwardly of the engine and direct the gases laterally out of the side opening, the vane structure directing the gases upwardly and forwardly to provide a reverse thrust. The vane structure itself includes a number of beams lying in parallel vertical planes and a number of vanes in the form of continuous strips extending transversely to the direction of the beams, the beams having slots through which the vanes pass to define an egg crate like interlocked grid structure. The vanes are tilted forwardly slightly relative to the vertical to provide the forward component of gas movement creating the reverse thrust.