Side-by-Side Seakeeping and Power Plant Comparisons of the Surface Effect Ships (SES) USCGC SEA HAWK and USN SES-200
Side-by-Side Seakeeping and Power Plant Comparisons of the Surface Effect Ships (SES) USCGC SEA HAWK and USN SES-200

Author:

Publisher:

Published: 1990

Total Pages: 140

ISBN-13:

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The performance characteristics of the U.S. Coast Guard 110' Surface Effect Ship (SES) CGC SEA HAWK and 160' U.S. Navy SES-200 are documented and compared. Engine performance in calm water and side-by-side rough water sea keeping performance tests were conducted in the Atlantic Ocean south of the Key West, Florida. The SES-200 ride control system was evaluated in the seaway. THe NASA Ride Quality Meter and Bruel and Kjaer Human Response Vibration Meter are compared and were used to document the discomfort level and human fatigue on board the SEA HAWK.

Annual Report 1989-90
Annual Report 1989-90

Author: New Brunswick. Department of Transportation

Publisher:

Published: 1991

Total Pages: 1272

ISBN-13: 9781550483925

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General activity review of associated branches and agencies to the Department which includes corporate securities registrations, a list of tenders received, and general financial data. Branches and agencies reviewed are responsible for motor vehicle activity, highway construction, traffic engineering, telecommunications and public utilities.

SES-200 (Surface Effect Ship) Technical Evaluation Test Report
SES-200 (Surface Effect Ship) Technical Evaluation Test Report

Author: J. D. Adams

Publisher:

Published: 1984

Total Pages: 190

ISBN-13:

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Surface Effect Ships (SES) can operate hullborne like displacement ships or they can operate in a cushionborne mode by pressurizing the region between that catamaran hulls with air. The air cushion exerts both a lift and a drag force on the hull as it moves over the water surface. The drag force, known as cushion wave making drag, represents a significant percentage of total SES resistance and hence, the required propeller thrust. Selection of cushion length-to-beam proportions is a fundamental part of SES design because the ratio of these dimensions determines the wave making resistance characteristics. The Navy has been conducting research on the effect of length-to-beam proportions on SES performance, seakeeping and maneuvering. This balanced performance is attributable to shifting the peak of the high wave drag region known as 'hump' outside the operating envelope. The name 'High Length-to-Beam SES' has been given to these vessels to distinguish them from the previous generation of Navy SES which had lower length-to-beam ratios and had to be propelled through a high drag speed regime in order to retain efficient cruise speeds.