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Fundamental factors governing yacht performance
aerofoil and hydrofoil action
B Dragviscosity phenomena
8 other sections not shown
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aerodynamic aerofoil angle of incidence apparent wind aspect ratio boat speed boundary layer camber cent characteristics chord circulation close-hauled components configuration course sailed crew curve cylinder developed displacement downwash drag angle drag coefficient driving force effect elliptic factors flow pattern fluid force coefficient ft/sec geometric given heeling force helmsman hull hydrodynamic hydrofoil ice boat illustrates incidence angle increase induced drag knots L/D ratio laminar leading edge lift coefficient load luff mainsail mast measured NACA optimum performance planform plate pressure distribution pressure gradient racing reduced relative resistance Reynolds Number rolling rudder sail area sail efficiency sail shape separation sheeting angle shown in Fig shown in Photo side force span stability stall streamlines surface tests theory thickness trailing edge true wind turbulent twist variation viscosity vortex vortices wind gradient wind speed wind tunnel wind velocity windward yacht