On the New Horsepower Coefficient of Propellers

Abstract

The design of a standard propeller series can be carried out with a K-η_p diagram which indicates the contour curves of the new horsepower coefficient K and the propeller efficiency in open water η_p upon values of pitch ratio as abscissae and values of (1-s) as ordinates, and with the aid of two diagrams which indicate basic relations of one P_l = 10^<-6>N^3D^5 and the other V_a = V_p(1-s).