Abstract: A first continuous fiber component and a second continuous fiber component are stacked with a non-woven fabric interposed therebetween to thereby prepare a fiber base material. The fiber base material is placed between an upper mold and a lower mold. The upper mold and the lower mold are brought close to each other to thereby form an enclosed space therebetween. The enclosed space is larger in volume than a product cavity. A liquid matrix resin is supplied to the enclosed space. The upper mold and the lower mold are brought closer to each other to thereby form the product cavity in a manner that a pressing load is applied to the fiber base material. Then, the liquid matrix resin with which the fiber base material has been impregnated is hardened in the product cavity, whereby a fiber-reinforced plastic molded article is produced.

Abstract: A first continuous fiber component and a second continuous fiber component are stacked with a non-woven fabric interposed therebetween to thereby prepare a fiber base material. The fiber base material is placed between an upper mold and a lower mold. The upper mold and the lower mold are brought close to each other to thereby form an enclosed space therebetween. The enclosed space is larger in volume than a product cavity. A liquid matrix resin is supplied to the enclosed space. The upper mold and the lower mold are brought closer to each other to thereby form the product cavity in a manner that a pressing load is applied to the fiber base material. Then, the liquid matrix resin with which the fiber base material has been impregnated is hardened in the product cavity, whereby a fiber-reinforced plastic molded article is produced.

Abstract: A skid rail for aircrafts comprising (i) a base member comprising a long board fixed to a bottom surface of an aircraft fuselage, and bosses integrally projecting from an outer surface of the long board with longitudinal intervals, (ii) cores bonded to the long board between the bosses to form a rail-shaped, integral structure, and (iii) a skin covering the bosses and the cores, the base member and the skin being formed by a first fiber-reinforced plastic having fabrics of glass fibers and/or carbon fibers, and the cores being formed by a second fiber-reinforced plastic having fabrics of fibers having higher wear resistance than that of fibers in the first fiber-reinforced plastic.

Abstract: Plural regions are defined within a main wing by a plurality of spars and ribs. Of these regions, predetermined regions extending from a main wing connecting portion of the pylon to an internal space of a leading edge skin are used as wiring/piping accommodating chambers for collectively accommodating wiring and piping which provide communication between an engine and a fuselage, a predetermined region adjacent to parts of the wiring/piping accommodating chambers is used as a landing device accommodating chamber for accommodating a landing device and predetermined regions adjacent to other parts of the wiring/piping accommodating chambers are used as fuel tanks. Thus, the maintainability is improved as compared with the case where the wiring and the piping are distributed within the main wing. In addition, because the wiring/piping accommodating chambers are isolated from the landing device accommodating chamber and the fuel tanks, the operational reliability can be improved.

Abstract: A skid rail for aircrafts comprising (i) a base member comprising a long board fixed to a bottom surface of an aircraft fuselage, and bosses integrally projecting from an outer surface of the long board with longitudinal intervals, (ii) cores bonded to the long board between the bosses to form a rail-shaped, integral structure, and (iii) a skin covering the bosses and the cores, the base member and the skin being formed by a first fiber-reinforced plastic having fabrics of glass fibers and/or carbon fibers, and the cores being formed by a second fiber-reinforced plastic having fabrics of fibers having higher wear resistance than that of fibers in the first fiber-reinforced plastic.

Abstract: In a wing structure for an aircraft, a rib extends in a chord direction for connecting spars to each other with upper and lower stringer through holes through which stringers of skins pass being formed in upper and lower edges of the rib. A bead is formed on the rib so as to extend between the upper and lower stringer through holes. Upper and lower ends of the bead are formed into arcuate shapes so as to surround the upper and lower stringer through holes, respectively. Thus, it is possible to enhance the buckling strength of the rib against a shear load acting on the wing of the aircraft.

Abstract: Plural regions are defined within a main wing by a plurality of spars and ribs. Of these regions, predetermined regions extending from a main wing connecting portion of the pylon to an internal space of a leading edge skin are used as wiring/piping accommodating chambers for collectively accommodating wiring and piping which provide communication between an engine and a fuselage, a predetermined region adjacent to parts of the wiring/piping accommodating chambers is used as a landing device accommodating chamber for accommodating a landing device and predetermined regions adjacent to other parts of the wiring/piping accommodating chambers are used as fuel tanks. Thus, the maintainability is improved as compared with the case where the wiring and the piping are distributed within the main wing. In addition, because the wiring/piping accommodating chambers are isolated from the landing device accommodating chamber and the fuel tanks, the operational reliability can be improved.

Abstract: In a wing structure for an aircraft, a rib extends in a chord direction for connecting spars to each other with upper and lower stringer through holes through which stringers of skins pass being formed in upper and lower edges of the rib. A bead is formed on the rib so as to extend between the upper and lower stringer through holes. Upper and lower ends of the bead are formed into arcuate shapes so as to surround the upper and lower stringer through holes, respectively. Thus, it is possible to enhance the buckling strength of the rib against a shear load acting on the wing of the aircraft.

Abstract: A method of manufacturing an elliptic deep-drawn product including a first step of providing an intermediate product and a second step of providing an end product. In the first step, a rotary forming die is used to form in a blank a substantially round formed portion of a U-shaped cross-section. In the second step, the formed portion is deformed at its semicircular portion by press working to form an elliptic portion, being formed into a final shape.

Abstract: A method of manufacturing an elliptic deep-drawn product including a first step of providing an intermediate product and a second step of providing an end product. In the first step, a rotary forming die is used to form in a blank a substantially round formed portion of a U-shaped cross-section. In the second step, the formed portion is deformed at its semicircular portion by press working to form an elliptic portion, being formed into a final shape.