Full Scale Testing of an Instrumented Conventional Lifeboat - Trials Review and Analysis

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DOIResolve DOI: http://doi.org/10.4224/18253397
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TypeTechnical Report
Series titleStudent Report
Physical description35 p.
SubjectNovember Trials; Lifeboat Trials; Collision Avoidance; Turning Circles; Trials Analysis; Holyrood
AbstractThis report describes a set of open water trials; performed on a full-scale conventional totally enclosed motor propelled survival craft. These trials were run as part of the “Performance and Survivability of Totally Enclosed Motor Propelled Survival Craft (TEMPSC) in Level and Pack Ice Conditions” project sponsored by the Program of Energy Research and Development (PERD) Marine Transportation and Offshore Safety Program. The objective of the PERD project is to evaluate the performance of evacuation craft (lifeboat) in environments where floating ice is present, as well as to recognize improvements that may be implemented. The aforementioned trials took place in November 2008, out of MUN/MI’s Holyrood facility, located on the north side of South Arm, Holyrood Bay, opposite the marina. To fully test the performance of the modified lifeboat, a number of open water tests were performed. These included both non-standard turning circles and collision avoidances. The raw data from the trials initially had to be calibrated, using a calibration file and in-house software called IOTDataLoggerCal. Once each file had been calibrated, it was loaded into IGOR, an integrated program for visualizing, analyzing, transforming and presenting data. Data analysis proved that there is a much smaller diameter for the port side turns than there is for the starboard turns. When comparing upwind and downwind turns the results seemed to be extremely varied, indicating that the direction of travel in terms of wind direction had no significant effect on turn diameter. The initial speeds, speed during the turns, and final speed varied slightly for each trial and this may mislead the comparison. The plots of Turn Diameter verses Rudder Angle indicated that as the rudder angle used in the turn increased, the turn diameter decreased.
Publication date
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedNo
NPARC number18253397
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Record identifierfa8f854e-bc1b-40dc-9f20-acdc5490ee0b
Record created2011-07-12
Record modified2016-10-03
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