FURTHER COMPUTER-ANALYZED DATA OF THE WAGENINGEN B-SCREW SERIES

In this paper the open-water characteristics of the Wageningen B-series propellers are given in polynomials for use in preliminary ship design studies by means of a computer. These polynomials were obtained with the aid of a multiple regression analysis of the original open-water test data of the 120propeller models comprising the B-series. All test data was corrected for Reynolds effects by means of an'equivalent profile ' method developed by Lerbs. For this Reynolds number effect ad-ditional polynomials are given. Criteria are included to facilitate the choice of expanded blade area and blade thickness. Finally, a number of new type of diagrams.are given with which the optimum diameter and optimum RPM can easily be determined. 1