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2 Cushion Systems
Scale for combining sound pressure levels
33 other sections not shown
acceleration achieved aerodynamic air cushion air propellers aircraft amphibious blade capital cost cavitation centrifugal fan characteristics clearance curves cushion pressure dBA level dBLIN decibel diameter diesel disc Dowty Rotol drag coefficient duct dynamic effect efficiency engine factor forces forward speed frequency Froude number ft/s fuel gas turbine glass-reinforced plastics Hawker Siddeley Dynamics HD.l heave hour Hovercraft Development Ltd Hovermarine HM.2 hull hump hydrodynamic increase induced wave drag intake km/h knots laminate lbf/ft2 lift loading material motion nozzle obtained operating overall passenger payload peripheral pitch plenum chamber PNdB power plant problem propeller noise ratio reduced Reference rev/min reverse thrust roll Rolls-Royce Rolls-Royce Gnome rotational scale SEDAM shown in Figure shows sidewall craft sidewall hovercraft skirt slipstream sound level sound pressure level stability static structure surface surface effect ship tip speed values vehicle velocity vortex noise water-jet yaw angle