Wheeled watercraft running on the surface of water
a watercraft and wheel technology, applied in watercraft, marine propulsion, vessel parts, etc., can solve the problems of rushing grebes using exceptionally high stride rates, and achieve the effects of reducing downward drag, high stride rates, and high water impact speed
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[0101]To get a clear idea of the magnitude of hydrodynamic and other force components (thrust, drag, lift, aerodynamic drag, vehicle weight) exerted on the watercraft when cruising at top speed, we consider next a case study with a characteristic set of values for the involved parameters. The list of input parameters is given in Table 1, and the results of calculations are presented in Table 2.
TABLE 1Design Input ParameterSymbolValueDimensionNumber of feet on one wheelN16—Base radius of the wheelr0.350mOuter radius of the wheelR0.379mWidth of the wheela0.250mWater densityρ1000kg / m3Air densityρa1.23kg / m3Immersion depth at cruising speedh0.029mWheel rotation rate—50HzAngular velocity of wheel rotationω314rad / sWatercraft cruising speedu55m / sDimensionless cruising speedη0.5—Longitudinal size of supporting plateb2mProjected frontal area of the watercraftA3m2Drag coefficient forCD1—immersed flat surfaces(foot bases and supporting plates)Aerodynamic drag coefficientCD0.3—f...
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