SNAME New England Section Hears Two Technical Papers

The New England Section of The Society of Naval Architects and Marine Engineers met in Newton, Mass. on September 29, to hear the presentation of two excellent technical papers.

Following cocktails and dinner, the technical meeting was opened by the chairman of the Section, Lyssimachos Vassilopoulos, who introduced the first author, W.H. Hanot, a Massachusetts Institute of Technology student in the Department of Ocean Engineering.

His paper was entitled "Development of an Electro-Acoustic Transducer for Sonobuoy Applications." The paper describes the development of a piezoelectric-based transducer f o r use as a directionally sensitive element in a sonobuoy. It is destined to replace the presently used electrodynamic transducer.

The new device features high sensitivity, directionality, wide bandwidth, and simple rigid construction.

The second paper entitled "Hydrodynamic Interaction Between the Rudder and Hull of a Sailing Vessel" was presented by the author, J.G. Arrison, a recent student at M.I.T. The paper describes the results of water tunnel experiments which investigated the forces on a rudder as a function of variations in hull-rudder combinations, and fixed fairings. Ways to increase boat turning moment with less drag and increased stability were suggested. These included antiventilation plates and movable skegs.

Copies of past and present Section papers may be purchased for $4, including postage, from the editor by writing Lt. Donald C.

Gerber, Department of Applied Science and Engineering, U.S. Coast Guard Academy, New London, Conn. 06320.

Maritime Reporter Magazine, page 27,  Nov 1978 Dori Naka-Ku

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