Abstract: An aerial vehicle includes a propulsion unit and a fuselage unit. The propulsion unit includes a rotary shaft extending in a first direction and thrust producing mechanisms provided at both ends of the rotary shaft and produces a propulsion force for flying in air. The fuselage unit is suspended from the propulsion unit below the rotary shaft, has a center of gravity at a position below the rotary shaft, is configured to freely rotate around the rotary shaft, and is capable of storing an article.

Abstract: [Objective] To provide, as to an aerial vehicle equipped with a multicopter mechanism, an aerial vehicle having both a vertical take-off and landing function and a horizontal cruise function and having an excellent cruising performance. [Solving Means] In order to accomplish the above-mentioned objective, an aerial vehicle according to an embodiment of the present invention includes a propulsion unit and a fuselage unit. The propulsion unit includes a rotary shaft extending in a first direction and thrust producing mechanisms provided at both ends of the rotary shaft and produces a propulsion force for flying in air. The fuselage unit is suspended from the propulsion unit below the rotary shaft, has a center of gravity at a position below the rotary shaft, is configured to be freely rotate around the rotary shaft, and is capable of storing an article.

Abstract: A jet noise source modeling method of creating a jet noise source model, includes: setting a plurality of point sound sources by quantizing a strength distribution of a jet noise source determined through an analysis of a jet stream and determining respective sound source strengths of respective point sound sources; and determining respective phases of the respective point sound sources based on a known noise level of a far free sound field related with the jet stream. An aircraft having an airframe capable of insulating the interior thereof from noises is designed on the basis of the results of the analysis.

Abstract: A jet noise source modeling method of creating a jet noise source model, includes: setting a plurality of point sound sources by quantizing a strength distribution of a jet noise source determined through an analysis of a jet stream and determining respective sound source strengths of respective point sound sources; and determining respective phases of the respective point sound sources based on a known noise level of a far free sound field related with the jet stream. An aircraft having an airframe capable of insulating the interior thereof from noises is designed on the basis of the results of the analysis.

Abstract: A grid convergence solution computation system computes a computed value (Ahigh) Of high-order accuracy, using a single grid, computes a computed value (Alow) of low-order accuracy, using the same single grid, and computes a grid convergence solution based on the relation between the computed value (Ahigh) of high-order accuracy and the computed value (Alow) of low-order accuracy on an assumption that the relation between the computed value (Ahigh) of high-order accuracy, the computed value (Alow) of low-order accuracy, and the grid convergence solution (Aconv) is substantially constant regardless of fineness or coarseness of the grid. The grid convergence solution computation system computes a highly accurate grid convergence solution (Aconv) by using small computational complexity.

Abstract: A grid convergence solution computation system computes a computed value (Ahigh) Of high-order accuracy, using a single grid, computes a computed value (Alow) of low-order accuracy, using the same single grid, and computes a grid convergence solution based on the relation between the computed value (Ahigh) of high-order accuracy and the computed value (Alow) of low-order accuracy on an assumption that the relation between the computed value (Ahigh) of high-order accuracy, the computed value (Alow) of low-order accuracy, and the grid convergence solution (Aconv) is substantially constant regardless of fineness or coarseness of the grid. The grid convergence solution computation system computes a highly accurate grid convergence solution (Aconv) by using small computational complexity.

Abstract: A blade of the rotor is attached to a main rotor shaft, and is rotated counterclockwise at a high speed when viewed from above. In the vicinity of the blade tip, a flap having a wing shape in section is pivotally supported with a hinge so as to be angularly displaceable and at the end a part of the rear end of the blade is cut out. A hinge line which indicates the center of the angular displacement of the hinge is formed so as to be parallel to a straight line passing through the rotation center of the rotor and the center of gravity of the flap. A helicopter rotor equipped with flaps is provided in which the influence of the centrifugal force acting on the center of gravity of a blade can be largely reduced, and a flap control mechanism can be reduced in size and weight.

Abstract: A process for production of high purity quarternary ammonium hydroxides, comprising electrolyzing quarternary ammonium hydrogencarbonates represented by the general formula: ##STR1## (wherein the symbols are as defined in the appended claims) in an electrolytic cell comprising an anode compartment and a cathode compartment defined by a cation exchange membrane. In accordance with this process, high purity quarternary ammonium hydroxides can be produced with high electrolytic efficiency and further without causing corrosion of equipment. Since the quarternary ammonium hydroxides produced by the present invention are of high purity, they can be effectively used as, for example, cleaners, etchants or developers for wafers in the production of IC and LSI in the field of electronics and semiconductors.

Abstract: A multi-electrode array deposited on a piezoelectric substrate is driven by a traveling-wave voltage generated from a wave delay generating device, such as a tapped coaxial cable. Suitably delayed and phased voltages are fed to each electrode in the array. Surface acoustic waves are excited on the surface of the piezoelectric substrate. The surface acoustic waves travel through the array in proper phase with the exciting signal supplied to the electrodes. The surface acoustic waves pick up energy as they travel along the surface. Such a structure has a number of advantages over the prior art conventional interdigital transducers. For example, they exhibit broad bandwidth characteristics, have high conversion efficiency and are generally free of spurious signals. These advantages make them well suited for application to video disc cutterheads.

Abstract: In an electric power-feeding structure for feeding an electric power from an electric power-supply terminal to electric power-receiving portions located at different positions, which comprises a main feeder assembly connected to the electric power-supply terminal and comprising a plurality of main line sections and a plurality of junction means respectively interposed between respective mutually adjacent main line sections and a plurality of branch feeder lines respectively connected, at their respective one ends, to a plurality of the electric power-receiving portions and, at their respective other ends, to the respective main line sections, the improvement in which said plurality of junction means each comprising at least one printed circuit board provided with first and second connecting portions and at least one third connecting portion and said main line sections comprise at least one flat type cable with flat connector means and are successively connected by cooperation of said first and second connecti

Abstract: A flat type cable suspension structure comprises a horizontally disposed holder member having a first retaining means, a keeper member having a second retaining means and a flat type cable firmly held therebetween by clamping. The first retaining means and the second retaining means cooperate with each other to crook flat type cable so that the cable can be firmly retained in the present suspension structure. The present cable suspension structure can be constructed in a compact form, thereby facilitating installation of an elevator cable assembly within a limited spacing between the side wall structure of a hoistway and an elevator cage. Further, by the use of the present suspension structure, the cable assembly can be installed adjustably in horizontal and vertical directions.

Abstract: An improvement in a flat type cable suspension structure which comprises a support structure comprising an upper support member and a lower support member vertically spaced from the upper support member and fixedly secured with respect to the ground, and a flat type jacketed cable extending crosswise with the support structure. The flat type cable extends downwardly through the spacing between the upper and lower support members toward said lower support member in such a manner that one face of the cable has a portion abutting against the rear side of the upper support member and the other face of the cable has a portion abutting against the front side of said lower support member. An exposed extension stemming outwardly from a tension member buried in the jacket of the cable is securely hooked over and held in a tightly suspended state on a hanger member provided on the front side of the upper support member.