Proceedings of the 19th general meeting of the American Towing Tank Conference, ATTC’80, Volume 1, University of Michigan, Ann Arbor Science, USA (summary)

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P1980-3

VOLUME 1

Proceedings of the

Nineteenth General Meeting

A M E R I C A N

TOWING T A N K

C O N F E R E N C E

Edited by

Stuart B. Cohen

July 9-11, 1980

Ann Arbor, Michigan

The University of Michigan

The Office of Naval Research

The Maritime Administration

A N N ARBOR SCIENCE

I ^ PUBLISHERS INC /THE BUTTERWORTH GROUP

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Published 1981 by A n n A r b o r Science Publishers, Ine. 230 Collingwood, P.O. Box 1425, A n n Arbor, Michigan 48106 Library of Congress Catalog Card Number 81-65041

ISBN 0-250^0444-3

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Preface

The Nineteenth General Meeting of fhe American T o w i n g Tank Conference was held in A n n A r b o r , Michigan f r o m the Qth lo the 11th of July, 1980. The technical sessions were held in the amphitheater of the Rackham Graduate School at the University nf Michigan. A b o u t 126 dele^gates and observers f r o m N o r t h and South America representing 35 professional estalohshments and universities attended the conference. I n addition, a number of students f r o m the U n i v e r s i t y of Michigan and the U n i v e r s i t y of Veracruz attended

Continuing the t r a d i t i o n begun by the 18th A T T C , there were six technical sessions. The executive committee discussed an additional session on model testing i n ice, but if was considered premature f o r this year and Dr, Vance's state-of-the-art report on ice testing was contained in the propulsion session.

The work of organizing the conference was considerably reduced by having each chairman of the technical committees be responsible f o r coordinating the w r i t t e n papers, the presen-nition of state-of-the-art reports and the transcription f r o m tape of the verbal discussions. The choice of papers to be presented, whether prepared in advance or brought to the conference by the authors, was entirely the chairman's decision. This amount of autonomy allowed papers to be submitted quite late, which brought new and very recent i n f o r m a t i o n fo the conference w i t h o u t the d i f f i c u l t i e s usually associated w i t h late authorship.

However, many more papers were brought late than expected. The volume of pages submitted required editing after the conference to reduce the number of pages. Principally this included the condensation of the abstract, introduction and coversheet into one page i f

possible, ^ Papers-prepared t w o months before the conference were sent out as preprints so that

w r i t t e n discussions could be prepared. Although this occurred i n several cases, the financial costs seem lo outweigh the benefits, and a simple list of papers and titles would have sufficed

We had planned to tape record the discussions to allow a more flexible and informal exchange of ideas, but the attempt was not successful. Much was lost when the speaker turned to face the blackboard or spoke s o f t l y . A f t e r the conference was over, there was little incentive for the transcriptions fo be made, so the w r i t t e n replies returned very slowly We suggest f u t u r e discussions be submitted in w r i t i n g as was done in the past i f they are to be included in the proceedings.

Due to lack of time, and one of the hottest Julys on record in A n n Arbor, there was no opportunity f o r discussion of fhe Steering and Maneuvering Session, Attendees were encouraged to send w r i t t e n discussions but. by the time of publication, none were received.

We w o u l d like to express our thanks to the sponsoring members who made this conference possible: The University of Michigan's DepaHment of Naval Architecture and Marine Engineering, and its Hydrodynamics Laboratory: the U,S, Navy's Office of Naval Research: and the U,S, Department of Commerce, M a r i t i m e A d m i n i s t r a t i o n

R.B, Couch, Chairman S,B, Cohen, Secretary

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Proceedings of the 19th general meeting of the American Towing Tank Conference, ATTC’80, Volume 1, University of Michigan, Ann Arbor Science, USA (summary)

P1980-3

VOLUME 1