Apr. 4 n 3873 p 368-369: Discussion of general features of behavior of vessels in still water and among waves; facts concerning natural periods of sea waves; what happens when vessel having natural still-water period of from 4 to 24 sec. is placed among deep-sea waves having period of anything up to 9 sec. or so. Apr. 11 n 3874p 396-397: Objects aimed at in attempting to devise method of stabilizing ships against rolling; work of H. Bessemer, O. Sehlick, V. Cremieu; use of gyroscope and pendulum. Apr. 18 n 3875 p 424-425: Details of Frahm anti-rolling tank system; dynamics of Frahm system. Apr. 25 n 3876 p 450-452: Vessels equipped with Frahm anti-rolling tanks; application of system to submarines led to important changes in design of tanks which has since been perpetuated in some post-war mercantile vessels. May 2 n 3877 p 478-479: Explanation of elementary principles of gyroscope. May 9 n 3878 p 514-516: Application of gyroscope to hull of ship; nature of heeling moment applied by train of waves to ship exposed to their action; plan of allowing gyroscope to process continuously in one direction with constant speed and of adjusting speed of spinning to suit magnitude of waves, presents practical difficulties. May 16 n 3879 p 536-537: Author considers, as alternative solution to continuous constant speed precession of gyroscope, its oscillation to and fro about precessional axis through range lying within plus or minus 90 deg. about initial or vertical position of axle; requirements for complete stabilization by means of oscillating gyroscope and how they are to be fulfilled are set forth. May 23 n 3880 p 569-571: Study of nature and magnitude of required retardation and acceleration of precession, and investigation of extent to which oscillating gyroscopic system is or can be made, self-adjusting in order that it may give complete stabilization to ship when magnitude of waves varies. May 30 n 3881 p 592-593: Causes which led to abandonment of Schlick system; gyroscopic system involves greater addition to displacement of vessel than does anti-rolling tank system, but Frahm system does not give complete stabilization to vessel; it reduces rolling to small amount but does not wholly eliminate it. June 6 n 3882 p 625-628: Examples of application of Schlick stabilizer; system was unsatisfactory, not because of miscalculation, but because use of fixed weight at fixed distance as means of supplying required precessional moment was wrong in principle; development of idea was taken up by Sperry Gyroscope Co. who did not, however, endeavor to perfect Schlick principle but instead struck out on line of its own characterized by new method of controlling precession. June 13 n 3883 p 650-651: Schlick and Sperry systems are alike in so far that, in both, flywheel, in fulfilling its stabilizing function, precesses about athwartship axis; provision made for application of precessional moment to gyroscope; use of twin wheels geared together was proposed by Sperry Co. in 1914, and in 1916 such equipment with two wheels 9 ft. in diam. was constructed. June 20 n 3884 p 692-693: Schneider-Fieux twin-wheel gyroscopic stabilizer; system follows principles explained in previous article in that two wheels are mounted to precess about vertical axes; novelty of system lies in method employed for generating and applying precessional moment; method makes use of remarkable form of hydraulic brake which lends itself to application about vertical axis; Fieux equipment is deliberately designed to give partial and not complete stabilization. June 27 n 3885 p 704-705, 55 figs: Two recent proposals are referred to; one, by Deparis, rests on fact that torque generated at propellers of vessel, propulsion torque, is accompanied by equal and opposite reaction torque on hull of ship; proposal consisted of varying reaction torque in such way as to provide stabilizing couple; second was advanced in 1923 by Motora of Mitsubishi Negasaki Shipyard; system makes use of fins projecting from side of hull at about turn of bilge.


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    Title :

    The automatic stabilisation of ships


    Additional title:

    Engineer


    Published in:

    Engineer ; 149 , n 3873-3885


    Publication date :

    1930


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :


    Gyroscopic stabilisation of ships

    Schilovsky, P.P. | Engineering Index Backfile | 1932


    Stabilisation of ships by activated fins

    Allan, J.F. | Engineering Index Backfile | 1945




    A Gain Scheduled Control Law for Fin/Rudder Roll Stabilisation of Ships

    Tanguy, H. / Lebret, G. / International Federation of Automatic Control | British Library Conference Proceedings | 2005