Scientific American Supplement, No. 799, April 25, 1891
THE NEW GERMAN DISPATCH BOAT METEOR.
This, we believe, is the fastest vessel of the kind afloat.—ED. S.A.
Shortly after the recovery of the Ulunda, below described, the North American and West Indian squadron of the Royal Navy visited Halifax, Nova Scotia. The simple and novel means adopted for raising the ship attracted considerable attention among the officers of the fleet, and by way of stimulating the studies of the junior officers in this branch of their duties, a prize was offered for the best essay on the subject, to be competed for by the midshipmen of the various ships. The essays were adjudicated upon by Captain W.G. Stopford, of the flag ship—H.M.S. Bellerophon—and the first prize was awarded to the following paper, written by Mr. A. Gordon Smith, of H.M.S. Canada. The article needs no apology, but it is only just, says the Engineer , to mention the fact that the writer is not yet eighteen years of age.
The steamship Ulunda, on the remarkable raising and recovery of which this paper is written, is an iron screw ship of 1,161 tons, until lately belonging to the Furness line. It is a sister ship to the Damara, of the same company, and was built and engined by Alex. Stephens, shipbuilder and engineer, at Glasgow, being fitted with compound vertical engines, of 200 nominal horse power, having two cylinders of 33 inches and 66 inches diameter respectively, which are capable of sixty-five revolutions per minute, and give a speed of twelve knots an hour.
For supplying steam to the engines there are two return-tube boilers, each having three furnaces, and there is also a donkey boiler, which is used in harbor for working the four steam winches on deck.
She is divided into seven watertight compartments by athwartship bulkheads. The foremost one is the usual collision bulkhead. Between this and the foremost engine room bulkhead are Nos. 1 and 2 holds, separated by a watertight bulkhead. Abaft the after engine room are two more holds, divided in the same manner as the forward ones, and astern is another compartment, in which all stores are kept. Coal bunkers form a protection for the engines and boilers. Fore and aft the ship, as low down as possible, are a number of ballast tanks, which can be filled with or emptied of water as occasion requires to alter the trim of the ship. Extending over all holds there is a strong iron lower deck, about 8 feet below the upper deck, which is pierced with a hatch over each hold immediately under a corresponding hatch in the upper deck, for stowing and unstowing cargo.
Various
---
SCIENTIFIC AMERICAN SUPPLEMENT NO. 799
NEW YORK, APRIL 25, 1891
THE NEW GERMAN DISPATCH BOAT METEOR.
THE RAISING OF THE ULUNDA.
THE THERMIC MOTOR OF THE FUTURE?
IMPROVED PNEUMATIC HAMMER.
SIBLEY COLLEGE LECTURES.—1890-91.
THE POWER OF WATER, OR HYDRAULICS SIMPLIFIED.
SELF-ACTING WATER-RAISING DEVICES.
THE NORIA OR BUCKET WHEEL.
ON GAS MOTORS.
A PROJECTING APPARATUS FOR BALANCES OF PRECISION.
STARCHES FOR THE FINISHING OF COTTON FABRICS.
THE ST. LAWRENCE HOSPITAL FOR THE INSANE.
LAVENDER AND ITS VARIETIES.
SPECTRUM OF THE SUN AND ELEMENTS.
ALLOTROPIC FORMS OF METALS.
A New Catalogue of Valuable Papers
$2.50 a Year. Single Copies, 25 cts.
Building Plans and Specifications.
THE SCIENTIFIC AMERICAN SUPPLEMENT.
PUBLISHED WEEKLY.
Useful Engineering Books