External electric drive propulsion module arrangement for swath vessels
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United States of America Patent
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-
Nov 28, 2000
Grant Date -
N/A
app pub date -
May 3, 1999
filing date -
May 3, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In the embodiments described in the specification, a SWATH vessel has a superstructure supported by strut members from a pair of pontoons and each pontoon has a propulsion module removably attached to the rear end of the pontoon. The propulsion module has a self contained propulsion system including a module body with a longitudinal water passage, a rim drive electric motor, a row of rotatable blades, and an inlet opening at the forward end of he cowl member which is arranged to draw in the boundary layer of water flowing along the pontoon to which the propulsion module is attached. Spaced vanes are provided at the inlet opening to block objects from being drawn into the longitudinal passage.
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