Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: May 27, 2025
Therefore, if the "well," or distance between the posts, be made sufficiently long in proportion to the screw, the "shake" due to the latter cause can be almost entirely obviated. In 1851, the British Admiralty selected three auxiliary screw-ships, of different classes and qualities, for an experimental cruise, namely:
This result operated powerfully in removing the repugnance to steam existing among all classes of seamen; and the vast superiority of well-organized screw-ships for the purposes of war is now so apparent, as to render them the most important and indispensable part of every navy.
It was believed by many officers, that a fast-sailing frigate, in a reefed-topsail breeze, would be able to get away from any screw-ship; but in a trial that took place between the Arethusa and the Encounter, and the Phaeton and Arrogant, under circumstances the most favorable to the sail-ships, it was found that the screw-ships, using both steam and sail, had decidedly the superiority, and that in fresh gales, with one, two, or three reefs in the topsails, either "by the wind," or "going free," the Phaeton and the Arethusa, the fastest sail-frigates in the navy, were always beaten by the Arrogant.
In considering the auxiliary screw-frigate under the views already offered, and in determining the canvas with which she should be supplied, it will be well to refer, as the best guide, to the fastest sail-ships, the class which presents the greatest similarity in form to that demanded in screw-ships.
Nasmyth designed a form of steam-engine after that of his steam-hammer, which has been extensively adopted all over the world for screw-ships of all sizes. The pyramidal form of this engine, its great simplicity and GET-AT-ABILITY of parts, together with the circumstance that all the weighty parts of the engine are kept low, have rendered it a universal favourite.
In this connection we mention the fact, that all screw-ships "by the wind" have a strong tendency to gripe. Would not this be obviated by having a gate or slide to fill out the dead-wood when the screw is lifted?
Experience has shown that the apprehensions entertained from the quick stroke of direct engines were without foundation; and that, in auxiliary ships, with a properly modelled propeller, there will be no necessity for a very high speed of piston. The form of engine generally adopted with great success in the later screw-ships.
Word Of The Day
Others Looking