Page 60: of Maritime Reporter Magazine (November 1977)

Los Angeles Section's Opening Meeting

At the September meeting of the Los Angeles Metropolitan Section, held aboard the Princess Louise in Los Angeles Harbor, from left: Dr. Kenneth Chen, Papers chairman; M.R. Ward, author/speaker; Frank A. Kuntz, chairman; William A. Hood, vice chairman, and Lt. Comdr. R.J. Kinnear, USN, secretary-treasurer.

Frank Kuntz introduced the new officers of the Los Angeles

Metropolitan Section of The So- ciety of Naval Architects and

Marine Engineers at their open- ing meeting for the new season.

He takes his place with them as

Chairman of the Section. William

A. Hood becomes the new vice chairman, and Lt. Comdr. Rich- ard J. Kinnear, USN, secretary- treasurer. The new Papers chair- man is Dr. Kenneth K. Chen.

The paper was presented by

M.R. Ward on the subject "A

Mathematically Correct Procedure for Fairing and Defining Ship's

Lines." Mr. Ward is the president of RTL, Inc., an architectural en- gineering and planning firm. Its corporate office is located in Gar- dena, Calif. His paper described a fairing procedure to define a hull surface and permit modifi- cation of a local area without af- fecting already corrected areas adjacent to it. "The method is an easy one to use," Mr. Ward said, "and requires only moderate com- puter capability, even for the largest hulls."

The procedure he recommended is based on the use of cubic equa- tions. It is a localized one consist- ing of modifying ordinates and slopes in two orthogonal direc- tions at each data point. A num- ber of computer programs have been written in FORTRAN IV by the firm's specialists to apply the fairing method outlined in the paper. The longest one, including subroutines, contains about 1,500 statements. The computer run- ning time is about one minute per frame, plus 10 minutes for an initial fairing. The program has been run for several hull types, including a large fishing vessel, a mariner type hull and a chine hull offshore supply ship. The re- sults are printed out to six sig- nificant places and checked nu- merically for compliance with the fairness criteria specified.

During the question and an- swer period later, the discussion livened up considerably. Relieved of the formality of his presenta- tion, Mr. Ward became quite open and warm in his exchanges with the members. He repeatedly re- ferred to several successful con- tracts completed by his firm to assure his listeners of the reli- ability of the program. He re- minded them the method requires only moderate computer capabil- ity, even for the largest hulls, and can be incorporated into almost any ship lofting system.

The appendices to his paper con- tain much of the background in- formation he used in his slide presentation. It includes the body plans of the ship designs dis- cussed, pages of sampled printer readout, a bibliography, and sev- eral pages of formulas delineating the basic concepts. The paper it- self discusses the mathematical premises for the procedure and illustrates the steps for establish- ing the fairness criteria.

It was a meeting fairly well attended, considering the highly specialized subject matter and the rather technical treatment of it.

The enthusiastic questioning of the speaker afterward certainly indicated the members' appreci- ation of his handling of it.

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Mr. Nissley is a registered pro- fessional engineer, a member of

The Society of Naval Architects and Marine Engineers, and serves in the United States Army Re- serve in the grade of colonel,

Corps of Engineers.

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MONTICELLO, ARKANSAS 71655 501-367-5361 501-367-6236 '/TSA KO /?0 Stf/P, -A/07 62 Maritime Reporter/Engineering • News