The Kootenai herald. [volume] (Kootenai, Idaho) 1891-1904, 1896-08-22

compressor. more storage battery cells
and two motors, one OF which works the
stern vertical screw, fixed in a we'll sim
liar to that in the bow. and the other
operating the horizontal screw. which
propels the vessel when it is submerged.
Has Three PropeIIers.
There are three horizontal propellers en-
the boat. Two of these are fixed like the
, twin screws of any ordinary vessel, and
are used when theb oat is running light
or awash. The third is a smaller screw,
placed above them, which will be used in
submarine work
There are three rudders at the stern Of
the boat-one vertical, for steering in tie
horizontal plane, and two horizontal, for
steering in the vertical plane. These rud-
ders are each rugged with ingenious auto
matte mechamsms.
When the vessel is running on the sur
face at full speed and 1t is desired to dive,
the ballast tanks will be allowed to ill
with water. The fires under the boiler
will be eXtinguished, the stack and venti-
lator shaft shipped into the boat and the
cover of the aperture through which they
are drawn swung around and clamoed.
The forward ends of the diving rudders
will be thrown upward, and then the VCs-
which it is desired to run is reached, the
automatic apparatus which controls the
horizontal rudders will be put into action.
If, by accident this mechanism fails end
vessel descends to a greater depth than
is desired, the pressure of the water on
the piston will admit such heavy tres
sure of air to the bow ballast tank that
about 1906 pounds of water will be ex-
PEELED from the boat, reducing her weight
so much as to give her a strong tendency
to rise
The first part of the submarine run will
be made under the steam left in the boil
ers when the fires were put out When it
is exhausted the propeller operated by
electricity, will be started. While run
ming, the vessel of course. will retain
her slight upward tendency, but this is to
be overcome by keeping the forward end
of the horizontal rudders slightly raised.
If it is desired that she lie still Inder
water, the propeller can be stopped. wa
ter admitted to the ballast tanks until
she retains an upward tendency equal
to S75 pounds and the vertical screws put
in motion to neutralize this buoyancy.
The boat can be trimmed by a shifting
Of the ballast. or by an increase, de-
crease or reversal of the motion of eth
er of the vertical screws.
The boat will also cary a camera luciia,
which can be pushed up in a tube four
and a half feet above the top of the tur-
ret. By means of this optical apparatus
/ the pilot in the coming tower can view
the surface of the sea on every side wnen
| the craft is running with four feet of wa
ter over the turret A Fleuss diving he'll
met will be provided for every member of
the crew. In case of disaster when sub
merged. such as filling Of one Of the va
ter tight compartments. the men can Put
on these helmets, allow the boat to FIJI
with water gradually. and then escape to
the surface through the companonw ny
AS a means of replenishing the air sup
ply while submerged there will be fas
| tened to the exterior of the boat a small
float, to which will be attached one end
/ Of a tube, the other end of which con
meets with the air COMPRISING machin-
cry. This float when cast loose. will
carry the tube to the surface and give the
boat direct connection with the atmos
phere. Eight dead lights on each side OF
the hull will admit light when she is run
ming on the surface, and when she is
/ travelling submerged incandescant lights
will illuminate her. All her movements
will be controlled from an electrical
switchboard in the coming tower.
The boat must be capable Of descending
to depth of 20 feet, but in actual var
fare it would not be necessary to sc
below 40 feet. II she went below 70 feet
| she would be in danger OF being crushed
by the great pressure OF water above.