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Scientific American Supplement, No. 586, March 26, 1887 by Various
page 15 of 134 (11%)
While the advances are not restricted to the English builders, a glance at
the points to which Thornycroft and Yarrow have brought their improvements
up to the present time will indicate that their achievements are not only
equal to but greater than those of any other builders.

The former has boats under construction 148 ft. long, 15 ft. beam, to make
420 revolutions with 130 lb. of steam, the guaranteed speed being 23 knots
on a continuous run of two hours' duration, with a load of 15 tons. They
will have triple-expansion or compound direct-acting surface-condensing
engines and twin screws, Thornycroft's patent tubular boilers, double
rudders, electric search lights, three masts and sails.

While the armaments of the various boats differ, Thornycroft is prepared to
fit the launching tubes with either air or powder impulse, to mount the
tubes forward or on deck, and also the fittings for machine and rapid
firing guns.

Yarrow and Co. have contracted for boats varying in length from 117 ft. to
166 ft., with fittings and armament as may be required. They have obtained
excellent results in their last English boat of the Admiralty type. They
are, in fact, prepared to guarantee a speed of 23 knots in a length of 125
ft. and 25 knots in a length of 140 ft., carrying in both causes a mean
load corresponding to fuel and armament of 10 tons.

And so the progress goes on, but it will not stop here; it has already
incited a marked development in ship construction, and the endeavors to
withstand torpedo attack have improved the defense against gun fire also.

In quoting a German opinion on the development of the Russian torpedo
fleet, Charmes refers to the type which will, no doubt, be most successful
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