File:Notes on torpedoes, offensive and defensive (1872) (14765824931).jpg

Identifier: notesontorpedoes00stot (find matches)
Title: Notes on torpedoes, offensive and defensive
Year: 1872 (1870s)
Authors: Stotherd, Richard Hugh, 1828-1895. (from old catalog)
Subjects: Torpedoes Submarine mines
Publisher: Washington, Govt. Print. Off.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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Bottom Flan: In order, therefore, to convert this into a buoyant mine,additional flotation must be given by the attachment ofbuoyant bodies thereto. The amount of flotation to beadded would involve conditions, dependent on the length ofmooring cable necessary and the nature of the current inwhich the mine is to be placed. The wooden jacket addsto a certain extent to the buoyancy, but it must be borne 302 mensions. in mind that, even with every precaution, the wood becomesmore or less saturated after submersion for any considerabletime, and only half the buoyancy due to this outer casingshould, on this account, be included in calculating for flota-tion to be given under any particular circumstances. The general design and dimensions of the 500-pound case in ) Fig. Five hundredpoimd case, con-struction and di-are shown in section in Fig. 116. The body is formed of J- 116.
Text Appearing After Image:
inch best iron boiler-plate. The ends are dished, au the mouth-piece and for the attachment of the One thousandpound case, cor 303 moorings are precisely similar in form to that of the 250-pound case. The whole of the iron-work should be paintedtwo coats; the case should he tested to a pressure of 40pounds on the square inch, gradually increasing from within.The calculated weight of the case, with charge complete, isabout 1,000 pounds; this exceeds the total buoyancy byabout 190 pounds; it has, therefore, no floating power, andif required to be floated np from the bottom the necessarybuoyancy must be attached. No definite pattern of case to contain a charge of 1,000pounds has yet been made; it should, however, be similarJJ^J^J aud diin form to the 500-pound case, and be composed of J-inchbest iron boiler-plate, and of such cubic space as to containthe requisite charge, viz, -J feet 9 inches by 3 feet 4 inches,not including the dish of the ends. The mouth-pieceshould be the same as bef

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