St. Paul daily globe. [volume] (Saint Paul, Minn.) 1884-1896, 1889-12-11
THIRTY KNOTS AN HOUR.
A Novel Craft to BE Launched To-
Day Expected TO Attain That
SDeed

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Speed.
NEW York, Dec. 10. - Tomorrow
morning most remarkable craft will
be launched from the shipyard of James
Lennox, South Brooklyn. The boat has
been named the Evolution, and was
built by Mr.. LennoX for DIR. w. NJ.
jackson, the designer of the craft and
patentee of the novel machinery with
which she is to be equipped. The Eyo-
luton is built on a new plan, there
being no knees or frames used in her
construction, and. with the exception of
two or three deck beams. her hull is free
from all obstruction. She is los feet
over all, twenty-three feet beam, and
six and one-half feet deep from under
side of deck to the bottom planking.
Owing to the tremendous spread the
hull takes from the keel, she will draw,
it is claimed. less than four feet of
water. The inside skin of the boat is
built of two layers of cedar planking;
the first layer is run diagonally from
stern to stem, and the second in the
same way from stem to stern. The out
side skin is of
NARROW STRIPS OF MAHOGANY,
running from stem TO stern. She is q
beautiful model. The keel of the boat
was laid March II, 1883, ''bliZZard day."
and the work of construction has been
going on ever since. She is only in
tended as an experimental craft, but it
is said that when her machinery has
been placed in position and everything
in readiness for the trial trip she will
have cost her owners not less than $780,
600. The boat is to be run by hydraulic
power by forcing out vast quantity of
Vii n
great pressure. To carry out this plan
a consuming engine of 1,500 horse
power has been constructed. The water
is pumped into the vessel through
eIght-ineh pipes on either side of the
keel about mid-ships, and is then forced
out through three-fourth-inch pipes at
the stem or STERN, according to the de-
sired motion of the vessel forward and
backward. The ends of the latter pipes
are covered with movable collars,
which can be turned in any direction
desired, and by this means the vessel is
steered. Instead of wheel tine pilot
STEERS WITH TWO LEVERS,
one for forward action and the other for
a stern movement of the vessel. The
levers are connected with the revolving
collars, and the direction of the craft is
obtained according to the angle of the
volume of water elected from the three
fourth inch pipes in stem or stern. 1t
is claimed that the boat can be given
broadSide motion by turning both eS-
Gaping jets of water {Stem and STERN,
either to port or starboard, as desired.
1t will thus be seen that rudder would
be SuperfluOus attachment. The boat,
however, has been supplied with rud-
der made of solid brass, which is so az
ranged that when not in use it can be
-, III Il 4,
will only be used when the vessel is
under sail. The boiler of the vessel is
about fcurteen feet wide, and fourteen
feet from end to end. and eight feet
high, has two fire doors at either end.
and contains nearly four and One-half
miles of steel pipe, every inch of which
is exposed to the fire contained within
the boiler. With this great heating
surface it is not strange that the great
pressure thus obtained forces the water
through and out of the three-quarter
inch pipes at the rate of about GOO feet
per second, or over Sc, 900 feet-about
SIX KNOTS PER MINUTE.
A little launch that was fitted out with
like machinery. though. of course, on
very much smaller scale, it is claimed
made over ten knots an hour. The en-
CINE used on this boat was only of about
eighteen horsepower and the volume of
water forced out of her measured less
than one-Quarter of AN inch III diameter
and was elected at the rate of 200 feet
per second. 1t was on the strength of
the performance of this boat that the
Evolution was built. Her outside sur
face is of polished mahogany and will
offer very little resistance to the water.
From the speed made by the small
launch it is confidently expected that
the larger craft will be able to run at
least twenty-five miles an hour and pos
siblY at much greater Speed.