Experimental Study of the hydrodynamic effect of angel change on stern by wedge in high speed boat of mono hull

High speed craft is one of the most sophisticated marine vehicles. Stability and speed are two important factors in the construction of planing hulls. The attractiveness and complexity of this type of vessel has led many researchers to work in this field. In the current paper, the effect of wedge on the stability and resistance of a mono-hull high speed craft is experimentally investigated. The studied vessel has a constant deadrise angle and the length to width ratio is 4.8. The tests were conducted at transverse Froude numbers of 0.1 - 4.26 at the National Iranian Marine Laboratory. The measured parameters are trim, rise up, resistance and the wetted length of chine and keel. The vessel at the speed of 8 m/s was unstable. To stabilize the vessel, a wedge with a height of 5 mm and a length of 92 mm has been used. In this case, in addition to the absence of porpoing, the resistance of the vessel, decreases.