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Updated: June 2, 2025
In consequence of the success of the Archimedes, the Admiralty ordered the Rattler to be fitted with a screw, and it was no small satisfaction to find that her double-cylinder engines could be easily adapted to the new propeller. She is of 888 tons, and two hundred horse-power, and was launched in the spring of 1843, being the first screw-vessel in the British navy.
With a canopy fitted to it a person could cruise all about the lake and stay out over night, for you could sleep on the seat cushions. It is twenty-one feet in length and has a five-and-a-half-foot beam, the design being what is known as a compromise stern. The motor is a double-cylinder two-cycle one, of ten horsepower.
I found that the engines had been made by Maudsley Sons and Field; they were of their latest improved double-cylinder construction. When I went down into the engine-room I felt myself in a sense at home; for the style of the engines brought to my mind many a pleasant remembrance of the days gone by.
There had been, it is true, some improvements over Franklin's printing press. The Columbian press of George Clymer of Philadelphia, invented in 1816, was a step forward. The Washington press, patented in 1829 by Samuel Rust of New York, was another step forward. Then had come Robert Hoe's double-cylinder, steamdriven printing press. But a swifter machine was wanted.
This style of press is now used extensively for printing country newspapers. As long as the newspaper interest of the country stood still, "Hoe's Double-Cylinder Press" was amply sufficient for its wants, but as the circulation of the journals of the large cities began to increase, the "double-cylinder" was often taxed far beyond its powers.
The American ten horse-power single-cylinder motor will go faster and farther on our roads than most foreign double-cylinder machines of the same horse-power. It will last longer and require less repairs.
When it was described, it proved to be as Watt said, "no less than our double-cylinder engine, worked upon our principle of expansion. It is fourteen years since I mentioned it to Mr. Smeaton." Watt had explained to Dr. Small his method of working steam expansively as early as May, 1769, and had adopted it in the Soho engine and also in the Shadwell engine erected in that year.
Returning to New York, he devoted himself entirely to this branch of his business, and soon produced the machine known as "Hoe's Double-Cylinder Press," which was capable of making about six thousand impressions per hour. The first press of this kind ever made was ordered by the New York Sun, and was the admiration of all the printers of the city.
It was in 1890 that I began on a double-cylinder engine. It was quite impractical to consider the single cylinder for transportation purposes the fly-wheel had to be entirely too heavy. Between making the first four-cycle engine of the Otto type and the start on a double cylinder I had made a great many experimental engines out of tubing. I fairly knew my way about.
At the pointed stern there revolved a powerful four-bladed propeller, and from each quarter, inclined slightly outwards from the middle line of the vessel, projected a somewhat smaller screw working underneath the after end of the air-planes. The hull contained four small double-cylinder engines, one of which actuated the stern-propeller, and the other three the fan-wheels and side-propellers.
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