METHOD OF INCREASE OF VESSEL SPEED AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2015 - IPC B63B1/40 B63B1/06 

FIELD: transportation.

SUBSTANCE: leading extremity of the bow bulb of underwater part of the vessel hull in horizontal longitudinal sections is offered to implement along the arch of circles with the radius R_h and the angle L of the circular sector of semi-contact equal to the angle φ_v of internal water friction at the depth h (cm) from free surface, L°=φ°_v=arctg[1-C_v/(γ_v·h)]=arctg[1-(0.28/h)], where C_v=274.642·10^-6 (kg/cm²) - specific cohesion of water, γ_v=981·10^-6(kg/cm³) - specific weight of water, and in vertical longitudinal sections - along arch of circles with the radius R_v with the angle β of circular sector of semi-contact equal to the angle R_v of internal water friction at the depth h > 80 cm, β°=φ°_v=45°.

EFFECT: decrease of water resistance to the vessel movement.

2 cl, 5 dwg