Predicting the performance of vertical axis propellers for escort tug operations

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Conference6th Canadian Marine Hydromechanics and Structures Conference, 23-26 May 2001, Vancouver, BC
Subjectescort tug; vertical axis propellers
AbstractVertical axis propellers have been widely accepted as a propulsion system for tugs because they provide several advantages over screw propellers. The principle attraction is their ability to vary thrust magnitude and direction, whilst maintaining a constant engine rotation rate. When applied to tug designs, the propellers are typically positioned so that they extend beyond the keel. This has the advantage of keeping the propellers in unobstructed flow, but has the disadvantage of placing them in a vulnerable position, which is normally compensated for by the addition of a protective cage. This type of propulsion system has been widely accepted for escort tugs, which use forces generated at high speeds and large yaw angles to control a tanker in an emergeny situation.
Publication date
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedNo
NRC number5390
NPARC number8895709
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Record identifier461e8082-4d4c-40eb-a681-bcdf825485c5
Record created2009-04-22
Record modified2016-05-09
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