Honolulu star-bulletin. [volume] (Honolulu [Oahu, Hawaii]) 1912-2010, 1915-03-26


/ IN moAsrate teptllBs sssslassal
|saR Perhaps you win ask why the nafe
sim 90 safety represented by the; re-
serve bGoyancy is not Increased when
these 1ksselss esmade ready Tor sub
merged navigation 81 sInsretnrnI ask
ifptdn qEaEetsver tried fOsswilm under
lMatsr when sustained byeas<life pre-
server? m $50, you will appreciRte the
fact that much Of yonr energy Masfre-
4uiFed 10 eettgOue6bOdy beneath the
surface, and that, taais left abut little
power 70 drive fg0ue FORWARD. is.A sub
marine To- ic0mp Osite weasel ,ess she
must be able 10 run both ontand below
the surface OF the sea This has nat
uraily created difficulties ii success
fHl planning and nat best any lsubma-
Eine or sllhmersible Isl a comRrelnise.
40 Perhaps the most skilftfl soIntionaof
this duplex pf6blem 81 tllat evolved by
the distinguished Italfan bheugineer,
Maj. 1seaAre Eaurenfi jas He has given
his subnefsfblet q lsi1fp4sllaeed ,toater
body which. makes 1t pOssible to pro
vide his boat witialan Nnnsual measure
s0f ba0yaney eWhenaranhing 1nethe sur
nee and incidentally pernhtts the hull
;i5sl 80 fofmedT kl1at his boat loanfI he
driven upon tBe sea ~ high speed with.
moderate engine power In this his
ilesfznl differs from iltheso submarine
Which has less nbupyaney IN ssurface
|Elfn6 End. while eapable of i higher
speed sndeFaWater il not 80 iseaMortIiy
NOR 50 fast on the surface as the sub.
1iiensi 5lea Inside the outer bull of the
Ea0rnntf ebCat lis ~ stzrd inner huh
eafa be aQfa resisting water pressure.
when deeply Submerged. I3etMeen tl1is
strong slleil and the ship$haped sstrae-
f0ne y q large air. space which fur
l1ishss the desired siarfacssE0inssbu buoy
anny. The moment pwater ballast dis
admittedito the tanxsoin the ,l0wer
part Of the bort. the fF9essed selfles.
deeper into the sea. and then DIX open
fng certain ports aor doors in the SUI
sljerS.fuetufe the slfi5laersihle usinks
much deeper. thus automatically sur.
rendering the greater part Of her or
binary factor of safety. because of
this ercater expsnse OF superstructure,
heweger. the sHbmersible is not capa
bic Of travelling so fast as the sub
marine. for the same power, under
water. These aFe the two forms that
modern underwater craft have follow,
ed. Ii aa s3i.si
AS ageneral,rille the Submarines in
The United States service are towed
on long trips and are Invariably act.
konlp1nied by another ship when ven
turing for any distance over the sea-
In stfi}dng contrast to this state of af.
fairs is the really extraordinary yoy-
age OF a submersible built after the
design OF Maj. LaHrenti Cor the SWed.
ish government The Hvalen Is boat
ef only as tons displacement, and
yet without an escort Of any sort she
Travelled practically S000 miles from
the shipyard at Spezia, Italy, to Stock.
holm. During that Journey she en-
a good deal of rough
weather, and yet she went steadily
onward, making her port of cab like
any other seagoing craft of much
larger size. ..s, H. ss..tfs
- The French have done notable
things Of late in keeping tine sea and
in Fauning long distances In th0ir sub.
mersihlss. but it must net be foEgotten
that their b0ats range all the way
from 400 tons to nearly 1000 tons in
The closest approach to
this character of vessel are the under
water craft developed by Mr.. Simon
ake. the Gil. huilt by him for our
1asfssa1 1assss,.x !, O.. - fha