Design Method for Contra-Rotating Propellers for High-Speed Crafts: Revising the Original Lerbs Theory in a Modern Perspective

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td align="left"> </td><td align="center">Design group A</td><td align="center">Design group B</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td align="left">Boat speed (kts)</td><td align="center">40</td><td align="center">30</td></tr><tr><td align="left">Engine power (kW)<br/></td><td align="center">1070</td><td align="center">1070</td></tr><tr><td align="left">Propeller RPM <br/></td><td align="center">1200</td><td align="center">1200</td></tr><tr><td align="left">Fore diameter (mm)<br/></td><td align="center">750</td><td align="center">750</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Design conditions for the propellers used in the parametric investigation.

International Journal of Rotating Machinery

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Table 2

Table 2: Design Method for Contra-Rotating Propellers for High-Speed Crafts: Revising the Original Lerbs Theory in a Modern Perspective 