This report contains the results of a limited set of side-by-side seakeeping tests using the USCGC PADRE (WPB 1328), a semi-planing monohull, and the USCGC SHEARWATER (WSES 3), a surface effect ship (SES). The objective was to obtain data that would allow the ride quality of the two boats to be compared. A short side-by-side test drifting in beam seas was followed by two sets of underway tests. Underway tests were performed at 15 knots in 3.2 ft. seas, and at 18 knots in 3.7 ft. seas, at five headings to the sea: head, bow, beam, quartering, and following. Roll, pitch, and yaw angle, roll, pitch and yaw rate, and heave, surge, and sway acceleration measurements were recorded and analyzed. Based on limited data taken at moderate speeds in low sea states, there was little difference between the motions of these two patrol boats while underway. The monohull rolls much more than the off-cushion SES while drifting in beam seas.
Side-By-Side Seakeeping Tests of the USCGC PADRE (WPB 1328) and the USCGC SHEARWATER (WSES 3)
1996
58 pages
Report
No indication
English
Ocean Sciences & Technology , Seakeeping , Surface effect ships , Patrol craft , Coast guard ships , Angles , Measurement , Ocean waves , Yaw , Acceleration , Graphs , Motion , Rates , Drift , Boats , Sea states , Ride quality
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