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 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.

• Corporate Authors:

  Arctec Incorporated

  Wilde Lake Village Green, Suite 255
  Columbia, MD  United States  21043
• Authors:
  • Lecourt, E J
• Publication Date: 1975-9-19

Media Info

• Pagination: 92 p.

Subject/Index Terms

• TRT Terms: Fluid resistance; Hulls; Ice; Icebreakers; Resistance (Mechanics); Tugboats
• Uncontrolled Terms: Hull resistance
• Old TRIS Terms: Ice resistance
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00131854
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: 202C-2 Final Rpt.
• Contract Numbers: DOT-CG-50383-A
• Files: TRIS
• Created Date: May 14 1976 12:00AM