AN INVESTIGATION INTO THE COURSE STABILITY OF THE BRITISH SHIP RESEARCH ASSOCIATION 0.85 BLOCK COEFFICIENT METHODICAL SERIES FORM
The report describes experiments carried out on the rotating-arm facility at the Admiralty Experiment Works, Haslar, to investigate the course stability of the B.S.R.A. 0.85 CB form. The fibreglass model, which was fitted with a propeller, was attached to the arm in such a way that it was free to heave, pitch, and roll, but constrained in the surge, sway, and yaw modes. The forces and moments acting on the model were measured with the model set at 48 and 80 ft radii. The side-slip angle was varied from minus 8 deg to plus 8 deg in steps of 2 deg at each radius. The results are plotted as non-dimensional side force against side-slip angle and non-dimensional yaw rates. Computed values of steady-state yaw rate have been plotted against rudder angle for different values of rudder derivative. On the basis of the experiments carried out it is concluded that this form would be directionally unstable with the area of rudder fitted for these tests, but attention is drawn to the fact that the degree of instability is no worse than that present in a number of large tankers already in service.
-
Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/0020868X
-
Corporate Authors:
International Periodical Press
193 Heemraadssingel
Rotterdam, Netherlands -
Authors:
- Clarke, D C
- Publication Date: 1970-4
Media Info
- Features: Appendices; Figures; References; Tables;
- Pagination: p. 117-126
-
Serial:
- International Shipbuilding Progress
- Volume: 17
- Issue Number: 188
- Publisher: IOS Press
- ISSN: 0020-868X
- Serial URL: http://www.iospress.nl/journal/international-shipbuilding-progress/
Subject/Index Terms
- TRT Terms: Ship motion; Ships; Stability (Mechanics); Stability analysis; Structural models
- Uncontrolled Terms: Ship models
- Old TRIS Terms: Course stability; Model testing; Ship stability
- Subject Areas: Bridges and other structures; Design; Marine Transportation; Safety and Human Factors; Vehicles and Equipment;
Filing Info
- Accession Number: 00005281
- Record Type: Publication
- Source Agency: Engineering Index
- Files: TRIS
- Created Date: Oct 30 1972 12:00AM