Unpublished paper, 'Notes upon the straining of ships caused by rolling' by Francis Elgar

Description

Elgar writes: 'It does not appear that any serious attempt has yet been made to investigate the amounts, or even the nature, of the principal straining actions which the rolling of a ship brings into play, or of the effect of those straining actions upon the material of which the hull is composed. Various writers, from Bouguer in 1746, down to Professor Macquorne Rankine in 1866, and Sir E. J. Reed in 1871, have discussed the straining actions that are caused by longitudinal racking and bending when a vessel is floating in statical equilibrium. Sir E. J. Reed elaborately investigated the subject in a paper contained in the “Philosophical Transactions of the Royal Society” for 1871, and gave examples of the amounts and distribution of the stresses caused by such straining actions in several typical ships of Her Majesty’s Navy.' The aim of Elgar's paper is 'to call attention to a straining action which [...] often operates so as to alter very considerably, both in intensity and in distribution, the stresses that are due to mere longitudinal bending.'

Annotations in pencil and ink throughout. Includes two pages of diagrams relating to strain.

Subject: Marine engineering / Physics

Received 28 December 1885. Communicated by Sir Edward James Reed.

Whilst the Royal Society declined to publish this paper in full, an abstract of the paper was published in volume 40 of the Proceedings of the Royal Society as 'Notes upon the straining of ships caused by rolling'.

Reference number

AP/63/12

Earliest possible date

1885

Physical description

Ink and graphite pencil on paper

Page extent

48 pages

Format

Manuscript
Diagram