DETERMINATION OF THE RESISTANCE OF FAST ROUND BOTTOM BOATS WITH CHINE IN THE ZONE OF THE AFTERBODY
The power performance of high speed, semi-displacement round bilge hulls can be improved by replacing the round bilge, before the transom, with a hard-chine. To investigate the influence of that position of the hard-chine on resistance, wetted surface and running trim, three models, conforming to the NPL-High Speed Round Bilge Displacement Hull form, but with different length-to-beam ratios, were tested. By applying the hard-chine, the resistance of all three models decreased. A significantly greater reduction in resistance was obtained by additionally applying two overlapping spray rails and a transom wedge. On the basis of the test results, a simple procedure for correcting the residuary resistance, the wetted surface and the running trim of the NPL Hull Series was developed.
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Supplemental Notes:
- Report; Vol.1-Main Report; Vol.2-Statistical Tables
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Corporate Authors:
Versuchsanstalt fur Wasserbau und Schiffbau
Berlin, GermanyForschungszentrum des Deutschen Schiffbaus
Hamburg, Germany -
Authors:
- Schwanecke, H
- MULLER-GRAF, B
- Publication Date: 1985-7-15
Language
- German
Media Info
- Features: References;
Subject/Index Terms
- TRT Terms: Artificial satellites; Fluid resistance; Hulls
- Uncontrolled Terms: Hull resistance; Model tests
- Old TRIS Terms: Afterbodies; Chines; Displacement hulls; Hull bottoms
- Subject Areas: Marine Transportation; Vehicles and Equipment;
Filing Info
- Accession Number: 00654062
- Record Type: Publication
- Source Agency: Maritime Technical Information Facility
- Report/Paper Numbers: 979/85
- Files: TRIS
- Created Date: Jul 21 1994 12:00AM