Informatics Publishing Limited

S. Basu

Abstract

Colonel Vijh, Mr. P. C. Bose. Mr. S. Bandopadhyaya, Dr. J. N. Basu, Mr. A. C. Sen, Mr. A. K. Sen, Members of the Association and friends, I am grateful to you all for the honour you have conferred on me, in accepting me, as your President for the year 1969.

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S. Basu

Abstract

Barges and Tugs have an importance, to the welfare and economy of our country that does not at the moment seem to be a matter of common concern. But 'here is a growing awareness of their increasing utility in transport of food by river from large foreign vessels, which cannot enter the port of Calcutta due to their drafts being greater than the depth of the river Hooghly.

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S. Basu

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Recognition is sought for by all Professional Bodies from those authorities who have the power to engage their services, to give them facilities, or give them aid. A simple declaration that the body is one of National importance is prized by them very much, as it serves to induce many to join the membership of the body and help towards their aims and objects.

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S. Basu

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Welding is the joining of two metal surfaces by raising their temperature sufficiently to melt and fuse them together. This is the method of joining together parts of materials of construction that has been the desire of all from time immemorial. But the difficulties of making a perfect weld and the dangers of defective welding to life and property have for long prevented the general adoption of welding for structures subjected to high stress or very frequent reversal of stress.

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S. Basu

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The words "Ton" and "Tonnage" are frequently used in describing various types of vessels and in discussing "ships and shipping" and confusion often arises as to their meaning, as there are several meanings with which these terms are employed.

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S. Basu

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The first article on this subject in the Journal of The Association of Engineers was published in the June issue of 1932. It was presented by the First Indian to have returned to this country with an academic degree in this subject from a foreign university.

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S. Basu

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The following consideration is made to determine the most economical dimensions of a Beam for a required section Modulus. Let Z = I/Y = the required section modulus.

A = total cross section area of Beam

Aw = area of web

Af = area of flanges

h = depth between centres of gravity of flanges

t = minimum thickness capable of being rolled

tw = thickness web

tf = thickness of each flange

then Aw = twh + twxtf/2 X 2 = twh (approx,)

Af = A-Aw

    = A-twh-twxtf = A-twh (approx.).

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S. Basu

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This subject has been referred to on a number of occasions. Articles have appeared in the Journal in 1932, 1935, 1937, 1938, 1943, 1945, 1950, 1952, yet the subject is brought up again this year in view of its topical interest. There are a few problems in ship design to which it is necessary to give publicity so that those who have to place orders for construction of ships might bear them in mind where considering the size of the ship which they should order and the speed at which it should be run.

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S. Basu

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Welding was introduced into shipbuilding gradually, with great hesitation, after much observation and experiment. It was accepted by classification societies in Great Britain after 12 years' observation of a fully welded ship, and rules for welded construction were framed on the basis of observation of this vessel, the 'Fullagar'. But even then, at least in Great Britain, the greatest shipbuilding country in the world, welding was not in general use for all parts of a vessel.

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S. Basu

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In the final issue of 1950 of this Journal, p. 81 an article was commenced on the design of ships with the intention of continuing it in the succeeding issues. It is regretted that for various unavoidable reasons it was not found possible to maintain the continuations as intended. Research in Naval Architecture is continually bringing new material to light. New methods of building and design are progressively being adopted, and often, by the time a method has been given publication a new one has come into practice making the other obsolete. It was partly to give due consideration to one such method that continuation of this article had been deferred.

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S. Basu

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Ship Design is the design of craft that could float in water in an upright manner and could be transported across water in the roughest condition of wind, weather, tide or current and at the same time contain in it accommodation and sanitary arrangements suitable for the habitation of human beings or animals ; and also suitable equipment for the powering of the ship for propulsion, lighting, pumping, lifting and navigation.

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S. Basu

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The need for institutions to spread knowledge of Naval Architecture, Marine Engineering, Naval Engineering, Shipbuilding, and Shipping, is being increasingly felt in India and has been recently voiced by many of her great leaders and men of note at several public functions. These subjects are at present little, known to the general public and ideas about them are often confused. It may therefore be of interest to give a description of what each of these terms connotes.

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S. Basu

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A ship docked for load line survey in 1948 had about 27 plates in the Hull, mostly on the wind and water line, renewed with mild steel plates. Before being undocked, the plates were cleaned, well and painted with two coats of red l^ad over which two coats of anti fouling paint were applied.

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S. Basu

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Mr. Basu thanked the members of the Scientia for the honour they had done him in asking him to lecture before them. He regretted that, as he had been called upon at very short notice, he had not had time to collect his thoughts and the "lecture" would therefore have to be in the nature of a rambling talk.

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S. Basu

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Mr. Chairman and Gentlemen,

The purpose of this talk is merely to provide some matter of interest to relieve the tedium of the formal business of electing scrutineers for which we have come together to-night.

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