Stepped surface propeller
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United States of America Patent
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Apr 15, 2014
Issued Date -
N/A
app pub date -
Mar 5, 2010
filing date -
Mar 5, 2010
priority date (Note) -
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Abstract
A marine surface propeller, and blade therefore, which is surface piercing and partially submerged, and includes a blade geometry that improves distribution of pressure and control to wetted and ventilated regions. Preferably, the feature has a positive step (ramp, cup, interceptor, indent or other geometric addition or intervention) between one fifth and four fifths chord length so as to create a high pressure peak or zone in what is now a low pressure zone on either the blade face or back or both and to create speed controllable wetted and ventilated regions.
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