SNAME New York Section Hears Paper On SWATH Vessels

A recent monthly meeting of the New York Metropolitan Section of The Society of Naval Architects and Marine Engineers heard a paper titled "Predicting Hydrodynamic Behavior of Small W a t e r p l a n e Area, Twin-Hull (SWATH) Ships." The author was Edward Numata, chief of the Dynamics Division at Davidson Laboratory, Stevens Institute of Technology.

The paper described existing naval and commercial SWATH vessels, and cited the reasons for choosing this type of hull configuration.

It also examined effects of changes in hull form and proportions on smooth-water resistance, and motions in rough water.

Analytical and e x p e r i m e n t al techniques presently available for use in the design process also were discussed. In conclusion, the author presented some relationships for use in predicting resistance and seakeeping behavior in early stages of SWATH design.

The honored guest for the meeting was Harry S. Townsend, who retired from the U.S. Salvage Association, Inc. in 1975. Mr. Townsend was very active in ship research and SNAME activities; he wrote several technical papers and served on various panels.

Other stories from May 15, 1980 issue


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