Icebreaking Model Tests of the 140-Foot WYTM.

Icebreaking model tests were conducted with models of the 140-foot WYTM which has been recently designed by the Coast Guard Naval Engineering Division. The WYTM is an icebreaking tugboat which will replace the aging 110-foot tugs on the Great Lakes and on the East Coast. The objectives of this model...

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Bibliographic Details
Main Author: Lecourt,E. J.
Other Authors: ARCTEC INC COLUMBIA MD
Format: Text
Language:English
Published: 1975
Subjects:
Marine Engineering
*ICEBREAKERS
VELOCITY
MATHEMATICAL MODELS
THICKNESS
EXPERIMENTAL DATA
SCALE MODELS
RESISTANCE
MODEL THEORY
COATINGS
ICE
MATHEMATICAL PREDICTION
MODEL TESTS
COEFFICIENTS
SHIP MODELS
FRICTION
SHIP HULLS
COAST GUARD SHIPS
TUGBOATS
MODEL BASINS
Arctic
Online Access:http://www.dtic.mil/docs/citations/ADA020324
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA020324
Description
Summary:Icebreaking model tests were conducted with models of the 140-foot WYTM which has been recently designed by the Coast Guard Naval Engineering Division. The WYTM is an icebreaking tugboat which will replace the aging 110-foot tugs on the Great Lakes and on the East Coast. The objectives of this model test program were: (1) To determine the icebreaking resistance of the WYTM as a function of velocity in uniform ice 1, 1.5, 2, and 2.5 feet thick; (2) To determine the effect of hull-ice friction on resistance by testing models with high and low coefficients of friction; and (3) To confirm the validity of dual model testing by towing two models side-by-side and comparing the measured resistance with single model test results. To achieve these objectives, a series of tests was conducted in the Arctic Ice Model Basin during May 1975. Using test data, an equation was determined to predict full-scale resistance of the tug in ice.

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