Accession Number : AD0475952


Title :   DESIGN OF SHIP RUDDERS (ZUR FORMGEBUNG VON SCHIFFSRUDERN)


Corporate Author : DAVID TAYLOR MODEL BASIN WASHINGTON DC


Personal Author(s) : Thieme, H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/475952.pdf


Report Date : Nov 1965


Pagination or Media Count : 82


Abstract : Starting from present day criteria for the choice of the size and arrangement of rudders, this paper discusses the suitable streamlining of guiding-head and balanced rudders. The report includes profile offsets not published previously and contrasts the form parameters of various rudder profiles which are based on a familiar mathematical method of profile representation. Comparative studies of several familiar foreign rudder profiles and of rudder profiles which have been developed in the Shipbuilding Institute in recent years indicate that the modern profiles definitely improve rudder efficiency, both when the ship is moving astern and ahead; this also applies to bow rudder profiles. The influence of the thickness ratio in the case of plate rudders--which has not been established experimentally in publications thus far--is indicated in all additional test series. To illustrate the possibilities of subsequently improving the rudder profile either in efficiency or balancing, the use of a rudder wedge arrangement, with and without profile shortening, is discussed. (Author)


Descriptors :   *MARINE RUDDERS , HYDROSTATICS , TABLES(DATA) , WEST GERMANY , HYDRODYNAMIC CONFIGURATIONS


Subject Categories : Marine Engineering


Distribution Statement : APPROVED FOR PUBLIC RELEASE