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BC Research Inc. was engaged to perform model tests at its Ocean Engineering Centre towing tank. Model tests conducted during the design process serve to optimize hull lines, ensuring that when the first vessel is built she will perform as predicted. Resistance and seakeeping tests were performed on a hull first with a conventional bow and then with a bulbous bow. The split screen video footage juxtaposes the conventional and bulbous bows at the same speeds and sea states. The bulbous bow appears to perform well in head sea conditions, seldom broaching the wave surface and re-entering cleanly on those occasions when it does. The conventional bow also handled the seas well, cleaving the swells with minimal commotion. Resistance tests show that the bulbous bow reduces the hull’s calm water resistance throughout the speed range tested. The observed reductions were 14 percent at 8 knots, 5 percent at 10 knots, and 3 percent at 12 knots. The bulbous bow did not appreciably reduce resistance when measured during the irregular sea state head seas tests.

   

 

 

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