Abstract: An outboard engine includes a buoyant member (20). The buoyant member has concavities (20L, 20R; 120L, 120R) formed in at least one side thereof. A plurality of outboard engines is mounted in parallel on the stem, and the concavities prevent interference with the other adjacent outboard engines when any of the outboard engines are tilted up.

Abstract: A boat propulsion engine includes a buoyant member (20) disposed on a case body that houses a drive shaft (47) in order to lift the stern. The buoyant member has a lower surface (32) that slopes downward in the rearward direction.

Abstract: A GPS position calculating apparatus is configured to acquire orbit information from navigation data contained in signals transmitted from GPS satellites, the orbit information including a position, clock time and orbital speed of each GPS satellite at a transmission time of each signal, to calculate a position of each GPS satellite at a reception time of the same signal at a measurement point, from the acquired orbital speed and clock time, to calculate a range of a line segment connecting the calculated position of each GPS satellite with a position of the measurement point using a time difference between the transmission time and the reception time, and to calculate the position of the measurement point using the calculated range of the line segment as a pseudorange. A GPS position calculating method carried out by the apparatus is also disclosed.

Abstract: A GPS position calculating apparatus is configured to acquire from navigation data contained in signals transmitted from GPS satellites, orbit information including a position, clock time, orbital speed and altitude of each GPS satellite at a transmission time of each signal from a respective one of the GPS satellites, then calculate a position of each GPS satellite at a reception time of the same signal at a measurement point on the basis of the acquired orbital speed and a time difference between the reception time and the transmission time, further calculate a first angle of the horizon relative to a first line segment connecting the second position of each GPS satellite with a position of the measurement point on the basis of a range of the first line segment and the acquired altitude, subsequently calculate a range of a second line segment connecting the first position of each GPS satellite with the position of the measurement point on the basis of the range of the first line segment, the first angle, an

Abstract: A boat propulsion engine (1) comprises a main body (4) that extends substantially vertically in relation to a hull (Si), a lift generator (20) disposed in a rear portion of the main body (4), and supporting bodies (24) that support the lift generator (20) on the main body (4). The lift generator (20) has a surface (21g, 21h) that extends transversely relative to the main body (4) and that is located behind at least the main body (4). The supporting bodies (24) extend backward from the main body (4) to the lift generator (20) in a single vertical direction relative to a surface (21g, 21h) of the lift generator (20).

Abstract: In a boat-propelling machine for attachment to a boat hull (200), an outer wall unit (4) is fixedly provided on a body of the machine for covering part of a cylindrical structural body (60) that is formed of metal alloy and positioned so as to be at least above a draft line during planning of the boat, and a lift force generation device (20) is provided on the outer vertical wall unit.

Abstract: A marine propulsion apparatus includes an anti-cavitation plate on a casing that supports a propeller. A lift generation plate, which generates lift during propulsion, is disposed at a position rearward of the casing and above the anti-cavitation plate and extends in a width direction of a hull. The lift generation plate is mounted on the casing via a stay.

Abstract: In a boat-propelling machine for attachment to a boat hull (200), an outer wall unit (4) is fixedly provided on a body of the machine for covering part of a cylindrical structural body (60) that is formed of metal alloy and positioned so as to be at least above a draft line during planning of the boat, and a lift force generation device (20) is provided on the outer vertical wall unit.

Abstract: A boat propulsion engine includes a buoyant member (20) disposed on a case body that houses a drive shaft (47) in order to lift the stern. The buoyant member has a lower surface (32) that slopes downward in the rearward direction.

Abstract: A boat propulsion engine (1) comprises a main body (4) that extends substantially vertically in relation to a hull (Si), a lift generator (20) disposed in a rear portion of the main body (4), and supporting bodies (24) that support the lift generator (20) on the main body (4). The lift generator (20) has a surface (21g, 21h) that extends transversely relative to the main body (4) and that is located behind at least the main body (4). The supporting bodies (24) extend backward from the main body (4) to the lift generator (20) in a single vertical direction relative to a surface (21g, 21h) of the lift generator (20).

Abstract: An outboard engine includes a buoyant member (20). The buoyant member has concavities (20L, 20R; 120L, 120R) formed in at least one side thereof. A plurality of outboard engines is mounted in parallel on the stem, and the concavities prevent interference with the other adjacent outboard engines when any of the outboard engines are tilted up.

Abstract: A marine propulsion apparatus includes an anti-cavitation plate on a casing that supports a propeller. A lift generation plate, which generates lift during propulsion, is disposed at a position rearward of the casing and above the anti-cavitation plate and extends in a width direction of a hull. The lift generation plate is mounted on the casing via a stay.

Abstract: An outboard engine comprises a power source inside a power source compartment. The power source room is formed by an upper cover and an undercover. A buoyant body is disposed outside the power source compartment, and has a lower surface wall in a position that is lower than the undercover. The buoyant body is provided separately from the upper cover.

Abstract: An outboard engine comprises a power source inside a power source room. The power source room is formed by an upper cover and an undercover. A buoyant body is disposed outside the power source room, and has a lower surface wall in a position that is lower than the undercover. The buoyant body is provided separately from the upper cover.

Abstract: An oil-cooled engine assembly is provided for cooling lubricating oil, which has lubricated movable parts of an engine and subsequently recirculating cooled lubricating oil to the movable parts. The engine assembly includes a lubricating oil pump contained in the engine, and a hollow frame body which supports the engine. The hollow frame body has an oil passage through which lubricating oil flows. The lubricating oil pump is connected to the oil passage. Lubricating oil, which has lubricated the movable parts of the engine is air cooled with the frame body. Cooled lubricating oil is circulated again to the movable parts of the engine.

Abstract: A center frame 64 fixed to a lower end of a swivel shaft 62 of an outboard engine system by a bolt 79 includes a swivel shaft extension 641 extending downwards from the lower end of the swivel shaft 62, and a core metal 642 which extends laterally from a lower end of the swivel shaft extension 641 and has a lower mount rubber 80 integrally baked thereto. The lower mount rubber 80 is restrained on a rear surface of the extension case 42. Thus, the distance between an upper mount rubber mounted at an upper portion of the swivel shaft 62 and the lower mount rubber 80 mounted at a lower portion of the swivel shaft 62 can be increased without downward extension of the swivel shaft 62 itself to enhance the anti-vibration effect, while avoiding an increase in extra weight and an increase in cost.

Abstract: In an outboard engine system, an inertia force a generated longitudinally by a piston 14 is countervailed by an inertia force b generated by a crankshaft 15, and inertia forces c and d subsidiarily laterally generated vibrate a body of the outboard engine system laterally about a phantom center point C of vibration. At this time, an elastomeric member 74 resiliently supporting the system body on a hull has a rigidity in a tangent direction (in the direction of L3) about the phantom center point C of vibration, which is set to be lower than a rigidity in a radial direction (in the direction of L2) about the phantom center point C of vibration. Therefore, the lateral vibration is reduced effectively due to the lower rigidity of the elastomeric member 74. Thrusts e and f generated by a propeller and acting in a longitudinal direction (in the direction of L1) are transmitted to the hull through the elastomeric member 74.

Abstract: Prior art movable types of artificial walls are incapable of offering attractive climbing on irregular wall surfaces, and in the case of a prior art artificial wall having an irregular shape formed on its wall surface, it is difficult to immediately change the irregular shape, and in addition, it is impossible to change the irregular shape while an athletic competition is in progress. A movable artificial wall according to the present invention includes multiple plates each made of a plate of polygonal shape and connected to one another by connection means each of which provides pivotal connection between the sides of the multiple plates, and is characterized in that the whole of each of at least two sides of one of the multiple plates is connected to the whole of one side of another of the multiple plates and the multiple plates are connected to one another so that the multiple plates are closely adjacently arranged about at least one vertex of at least one of the multiple plates.

Abstract: An oil-cooled engine assembly is provided for cooling lubricating oil, which has lubricated movable parts of an engine and subsequently recirculating cooled lubricating oil to the movable parts. The engine assembly includes a lubricating oil pump contained in the engine, and a hollow frame body which supports the engine. The hollow frame body has an oil passage through which lubricating oil flows. The lubricating oil pump is connected to the oil passage. Lubricating oil, which has lubricated the movable parts of the engine is air cooled with the frame body. Cooled lubricating oil is circulated again to the movable parts of the engine.

Abstract: Prior art movable types of artificial walls are incapable of offering attractive climbing on irregular wall surfaces, and in the case of a prior art artificial wall having an irregular shape formed on its wall surface, it is difficult to immediately change the irregular shape, and in addition, it is impossible to change the irregular shape while an athletic competition is in progress. A movable artificial wall according to the present invention includes multiple plates each made of a plate of polygonal shape and connected to one another by connection means each of which provides pivotal connection between the sides of the multiple plates, and is characterized in that the whole of each of at least two sides of one of the multiple plates is connected to the whole of one side of another of the multiple plates and the multiple plates are connected to one another so that the multiple plates are closely adjacently arranged about at least one vertex of at least one of the multiple plates.