New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1854-04-08
A NEW ERA ~ NAVIC ATION.

rose, and the H0use ADJOURNED III
NEW ERA ~ NAVIGATION.
We have alreody noticed the project of building
onster steamer in regard 70 which occasional bref
paragraphs have appeared in the Eogsh journals from
time time during the past year and now learn that
the scheme is in process of actual execution The con-
sructors are Messrs Russell Scott & Co. Mr. Brunei,
the eminent engineer who built the Thames tunne is
the designer and the Eastern Steam Navigation Com
pany are to own the ship, which is intended to run
from England to Calcutta. II is TO be blit prjn-
cpe similar to that of the Britannia bridge with dcu
bic tdes-in fact sh inclOsed in anO'herwlth the
space between them palitOncd INTO air-tisht cells
The frame will be stiiened internally by two bulk
heads running the entire length Of the hull and dyid
ing the vessel lengthWse into three cOmpar nen.s.
Twelve similar water-tight partitions VIII cut her
croeswise adding to her strength well safety, for
a leak would thus only affect the compartment in
which il occurred which might be led with water
without seriously diminishing the buO!oncy Of the
slip.
The keel is to lie $50 feet in length beam So feet,
depth of hold 5S feet From these figures we estimate
tie real capacity of the vessel to be at least 10000
tu1s. There is to be stOwage for 10000 tuns of coal
enough for about forty days stealning without stop
psge-and 5000 tuns OF cargo The motive pOwerist)
be composed Of sails, paddle wheels and screw. The
engines are to be of 2SOO horsepower 10 the aggre
gate weighing about 5000 tuns Leaving 600 tuns for
passengers stores ard other matters. To form an ap
prOxmate idea OF the performance OF this ship Lee US
compare it to known standard. The Dimensions of
the Collins steamers Length 277 feet; beam I5
feet, depth of hold, 80 feet; power Calculated by the
nan m IL
lie go feet and the area of the immersed section 10
fquare feet This gives 1000 horse power for each
square OF of immersed section. For the new ship
we will suppose draft OF 80 feet The immersed
ton viii then be 2,40O square feet ana each square
foot will be mpclcd by 116 100 horsepower Tne
consequence it, that il the model of the vessel be
10 better than that of the Collins steamers she will
have in smooth water exactly the sane velocity In
rough the large chip will Of course have the aiyan-
tage ard this perhaps TO much greater extent than
will generally he imagined
Common experience is, however instructive on this
head. We all know that there are days in winter
when owing to the violence of the waves and wind,
IowlOat the East River might be an hour in cross
ing, despite the most animated eyerODs OF the
men, IL the boisterous weather one OF the large
ferry beats will cross ia FIVE minutes with scarcely
any motion from the sea- for the that its length
is such to extend at over several waves whose
effect upon the vessel s to counterfeit each her
leaving her siiA, when small boat is tossed abou.
without mercy and greatly delayed and endangered
Ii is certainly possible TO build vessel of such d
mensons that it will bear to the waves of the Atlantic
tie same relation which the ferryb0as bears 10 those
/ of New-York harbOr. When these dimensions are
reached the may be navgated as pleasantly and
sal, ly in winter ia summer. Whether the length
of zoo feet be sufficient for this purpose is question
that may hope to have solved ere long by the new
BrObdisnsg OF Mr.. Brunei
But while in respect of speed there seems TO be no
other point of superiority in the new steamer, than
her bulk we may find in her enormous stowage an adj
vantage sufficient to justify the riskug of the vas.
amount of capital which she must cost No other yes
eel con transport such a quantity Of coal or O her
lsdipg. In round numbers one horse power consumes
tun of coal in ten days \ Coli1s steamer crossog
the Atlautic in that sine, AMI having a propellug
power OF 500 horses requires consequently sowsge for
81 tuDs Of coal besides the surplus for unexpected
emergencies. But the case is quite different Fith =
steamship going to Calcutta, Q di:tance Of IL 600
miles instead of 5000, requiring at the same speed,
for forty DAYS sesmirg, four uns Of coal for every
morse power his, steamer OF ord nary size could
net carry. Hall the weight would sirk such steamer
but the LeyisIhsn can bear il easily. The force o!
2SC0 horses would require II 200 turs Of coal the
Lew steamer has accommodates for Il 600; and as
for the difference, they viii either d. without IT, On
account Of the superior speed Of large shp or they
can stow deck few hundred tuns TO be burned a.
the commencement Of the voyage, before the passsn-
gers have got over their seasickness II indeed me
magnitude Of the hull does not dispense with that
mAlsdy.
We have already stated ills vessel is intended TO
bsye paddle wheels and q screw, beside earring az
much sail as sailing vessel This arrangement sp-
pears highly Objectionable. Sails and screw nay help
each other but when paddle wheels are used sails %
great extent are worse than useless screw 10
combination with paddle wheels may do something.
though the psddle-whees b. setting the water in no.
tion must in some measure impede is action. At
any rate, tie power thus consumed would be
more usefully spilled to the psdd.c-wleels, ii
they were proPortionately w.lened. De.
| fees so Obvious cannot have escaped 50 acute an
engineer Mr. Brunei and the onlg reason we can as
sign for bis having admitted them is the difficulty tie
inpossibiliiy almost with our present means Of Guild.
irg engines of sufficient magnitude for such hull.
Hence the necessity OF dividing the power among se7e-
raj ordinary machines and a. these cannot all be placed