New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1897-05-23

smaller boat be moro easily man1uvred thah
the larger, she can operate, submerged IN only
twelve feet OF water, whereas the other ono TO-
oures 10 or IS, her cost will be about SlOooo. az
against $4,000, she can be worked with hve or SIX
men. instead Of requiring q crew OF ten. besides
possessing other excellences to which reference VIII
be made presently Hence, as Mr. Holland puts II,
"she concentrates greater power in less space and
presents a smaller target to the enemy
EXCEPT when considerations OF fety or strategy
require that this boat shall he completely sub
merged It ls intended that she shall float with
about one-eighth or one-quarter OF her hull above
the surface. Under the circumstances she would
loo,s sometbing like a dlmnutive "whaleback." The
Only projection from her upper surface-it could
hardly be called deck-is a small coming tower.
or p.ot-house. having an inside diameter OF twenty
inches and surmounted by a hinged cover. through
this opening alone Is admission obtained to tho IN
terror OF tho hull. The tower 10 telescope. and its
heirht may DO varied from eight TO thirty inches
Peepholes In tho tower give the pilot who Is also
the commander q wide range OF vision. The Bau-
moro boat. which 10 to be propelled by steam and
rsnerates her power BY burning petroleum or other
fuel. has q smokestaok coming up just aft OF the
coming tower This can be lowered and the open
Ing Isft IN the hull can be closed when II Is de-
s,rable TO sink below the surface. The Elizabeth
mort boat however, win use . gasoline engine and
requires no smokestack. This viii simplify matters
and tighten the craft. There are small. well-guarded
Headlights in tho upper surface OF tho null, 100,
which admit daylight whom the boat Is floating
THE METHOD OF PROPULSION.
propulsion Is effected with q screw. protection for
vh,ch and for the rudders Il Afforded by a broad
nearly circular guard astern. At present tho now
ho.t has A D-horse-power engine. but this will be
renIaced In tina with q soo-horse-power engine. MT
uo,ana believes that she can carry enough gasoline
for a cruise Of at least two thousand miles, ana
some,,mes he permits himself to think that she
might possibly cover even nve thousand miles with
ont putting into port for fresh supplies OF gasoline
Tn. Baltimore boat Is provided with three tripio-
.x,an.,on engines whose combined horsepower Is
On BIZ, she will probably never be able to steam
mora than one thousand with one full STOCK OF lue
Th, unoue feature OF this class OF vessels. the
sh,lItv 20 navigate when fully submerged, makes II
necessary TO equip them with some appliances not
or,rsd m other torpedo boats. When tho craft
=, 49,, % divs the engine whether driven BY
,..r, ar sas II shut down. and all openings Tor the
d,.chsrse Of tho products OF combustion are ushuy
sealed The screw II then rotated oy e'ec'Eo p""eI
A storage battery. previously charged now FUR
nI.hes current for electric motor that taxes the
-, - o.. .n1,na The battery Of the boat which
-. de-, h.sn launched contains sixty cells OF the
$4,000" ,vne and Mr.. Holland considers II the
nnest installation Of its kind on any submarine
craft All foreign boats OF this description are
ohuged To 20 into port to have their storage Dat
..-,a. ,re.hly charged. but the two Holland boats
- :. .r,,relv independent In the matter OF cleo
.,,.,,v, They are. or will be- provided with their
on,n dvnamos, which can be employed In charging
, battery at any time when the vessels are At the
aurface The engines can theh Do useo u uii'o
~. dvnamos and sufficient amount OF power TOT
"a. - Under water can always be kept In storage
ready for any emergency 49,
Another exceedingly important novelty IN the
80 n, these vessels Is the horizontal rudder ar
roneed Just above the ordinary vertical rodder'
,yhen the former Is depressed its effect II to throw
the bow Of the boat downward wren I" Is turhea
~. ~. onnosite direction the bow aims upward OF
.o,,rse the boat does not go straight up or down.
hut moves at only slight angle with the horizontal
This however. is amply sufficient for practical
ourpossa and, In fact, 10 vastly prefsrae's TO- =
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