The Maritime History of the Great Lakes
Detroit Free Press (Detroit, MI), Tues., Aug 11, 1891

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The Naphtha Launch

The Detroit boat works are still experimenting with its naphtha launch, a short mention of which was made in The Free Press some weeks ago. The craft is an ordinary open launch thirty feet long and seven and one-half feet wide, but her motive power is the wonder and admiration of all the marine men in this section of the lake country. It is the invention of Clark Sintz, of Springfield, O., and although patented in 1877, has never before been tried as a marine engine until this year. The Detroit Boat Works Company have practically secured the sole right to use it, and they will develop the engine for all they and it are worth. General Manager Ballin and Supt. Seymour took a short spin on the river yesterday afternoon with the little craft, and barring the fact that the engine rattles a good deal and that it needs regulating, it worked to a charm. It is a double engine with two cylinders of five inches diameter each. The naphtha is forced up through a pipe by a little pump worked by a camel attached to the propeller shaft. As the naphtha is pumped up air is sucked in through the opening above, and goes direct to the cylinders passing through the fluid on the way and entering the cylinders as naphtha air. An electrical apparatus explodes this air in the cylinders and its action causes the pistons to churn. One piston compresses the air while the other exhausts it, and thus they work alternately. The little craft uses two-fifths of a gallon of naphtha per hour and at the present price of the stuff can be run for twenty-four hours at an expense of seventy-five cents. Mr. Ballin says she can be driven at the rate of nine miles per hour,and that the company are so satisfied with the practicability of the engine that they will build a larger boat and put in an engine to correspond.

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Tues., Aug 11, 1891
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Dave Swayze
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Public domain: Copyright has expired according to the applicable Canadian or American laws. No restrictions on use.
Maritime History of the Great Lakes
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Detroit Free Press (Detroit, MI), Tues., Aug 11, 1891