<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">The division of the global resistance change ΔRR+D due to the simultaneous action of the pushing (SR) and pulling(SD) screw propellers into the components ΔRR and ΔRD can be done by taking into account two different procedures and different hypothetical assumptions given in the form of the division coefficients (Aj)R and (Aj)D, the same in each procedure.In the procedure no1: ΔRR = ΔRR+D(Aj) and ΔRR = ΔRR+D(Aj)DjIn the procedure no 2: ΔRR = TR - (R0 - FD) (Aj)R and ΔRD = TD - (R0 - FD) (Aj)D Two necessary conditions were formulated to be fulfilled when selection of the coefficients (Aj)R and (Aj)D is done. The results of the analysis are univocal. Among the possible division coefficients only one pair of them fulfills the formulated conditions. This pair is:<inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="pomr.2008.15.issue-2_figure1.gif"></inline-graphic></abstract>

The division of the global resistance change ΔRR+D due to the simultaneous action of the pushing (SR) and pulling(SD) screw propellers into the components ΔRR and ΔRD can be done by taking into account two different procedures and different hypothetical assumptions given in the form of the division coefficients (Aj)R and (Aj)D, the same in each procedure.In the procedure no1: ΔRR = ΔRR+D(Aj) and ΔRR = ΔRR+D(Aj)DjIn the procedure no 2: ΔRR = TR - (R0 - FD) (Aj)R and ΔRD = TD - (R0 - FD) (Aj)D Two necessary conditions were formulated to be fulfilled when selection of the coefficients (Aj)R and (Aj)D is done. The results of the analysis are univocal. Among the possible division coefficients only one pair of them fulfills the formulated conditions. This pair is:

How to divide the global resistance change into the components related to the pushing propeller and the pulling propeller of the double-ended ship

Polish Maritime Research

The division of the global resistance change ΔRR+D due to the simultaneous action of the pushing (SR) and pulling(SD) screw propellers into the components ΔRR...

How to divide the global resistance change into the components related to the pushing propeller and the pulling propeller of the double-ended ship

Published Online: Jul 23, 2008

Page range: 12 - 14

DOI: https://doi.org/10.2478/v10012-007-0058-1

Keywords
self propulsion tests, double-ended ships, resistance change due to propeller action

This content is open access.

How to divide the global resistance change into the components related to the pushing propeller and the pulling propeller of the double-ended ship

Published Online: Jul 23, 2008

Page range: 12 - 14

DOI: https://doi.org/10.2478/v10012-007-0058-1

Keywordsself propulsion tests, double-ended ships, resistance change due to propeller action

This content is open access.

Keywords
self propulsion tests, double-ended ships, resistance change due to propeller action