A Text Book of Naval Architecture: For the Use of Officers of the Royal Navy (Classic Reprint) - Hardcover

J. J. Welch

9780365267362: A Text Book of Naval Architecture: For the Use of Officers of the Royal Navy (Classic Reprint)

Hardcover

ISBN 10: 0365267368 ISBN 13: 9780365267362

Publisher: Forgotten Books, 2018

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Excerpt from A Text Book of Naval Architecture: For the Use of Officers of the Royal Navy

The vertical ﬂuid pressures are the most important, as these give the buoyancy which supports the ship. Since any number of parallel forces may be supposed replaced by a single force - or resultant as it is termed - acting parallel to them and equal to their sum, it is only necessary to determine the magnitude of this resultant and the position of its line of action, in order to find the effect of all the vertical pressures upon the ship. Before. Proceeding to do this, one or two definitions will be given.

The centre of gravity of a body may be defined as the point through which the weight of the body, when at rest, may be supposed to act, in a direction vertically downwards.

When a ship is immersed in water, it occupies a certain Space which would otherwise be filled with water the quantity of ﬂuid so dislodged is called the displacement, and may be measured by its volume in cubic feet or its weight in tons in the former case it is known as the volume, and in the latter the weight of displace ment. When displacement alone is spoken of, the weight of' displacement is usually meant.

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