The New York herald. [volume] (New York [N.Y.]) 1840-1920, 1866-01-14

4
The condensation Of the steam Ia affected by admitting
the exhaust steam from the cylinders into two chambe
stanty circulated The advantage Of surface condens
ton is obviously that the condensed steam in the fora
OF distilled water may be returned 10 the boilers, there
by nearly dispensing with the Of salt water Each q
the surface condense Of the Madawaska Is ten feet tep
inches long by nine feel three VIDE four feet nv
brass tubes fve-eghth inches external diameter on
the top Of each condenser Is placed water circulating
fan made of "copper" six feet in diameter, enclosed in
circular cast bex the centre Of which communicated
with the tube chambers Of the condenser The exit u
communicate with the by Of appropriate ppsS
and stop valves. The fan is driven BY two twelve
inch steam cylinders, sixteen inches stroke placed
at right angles, ON the top Of the fan boz.
The advantage of this mode OF circulating cold
regularity and continuity Of the current the almost
limited supply OF the cooling medium affords the alb
sence Of the ordinary pump Win tner LIABILITY 70
ton Hence in the Madawaska, maximum power OF
frgeration may all times be exerted however slow the
motive engines work while in the Wampanoag and the
other ships OF the class with ordinary recprocaug CIR
culang pumps worked by the motive engine, the supply
of cold water 10 the condenser tubes will DO stned ae
times when the engines consequence Of great resist
ance, move slow and demand heavy pressure.
STERN ARRAEoExExr, PRopEILER AND LINE SHAFT.
The stern arrangement * ss Il. xsdswsso. is admirably
radder, constructed the balance system, 10 a.
iron over which has been cast coating OF brass half a
inch thick all dncut operation very successfully
DrasS covered
in casing Of copper plates quarter OF inch thiok
which forms the rudder The plates arc Joined very
neatly and the yets being ecunter sunk and Hush ne
der stem lined with brass and turned the pintls
being supported by projecting arm bent upwards as 9
Dictator, protect the pnte in the ship should
touch ground The weight Of the rudder Is sus-
pended . wrought Iron collar, secured TO the
upper end OF the rudder stem, turning on .
series of steel rollers. The propeller s true screw
with four blades 10 feet diameter and 30 feet pitch casa
OF composition metal weight 20 $50 pounds The pro-
peer shaft and line shafting is l44 feet In length, 10
shaft may be instantly detached from the rest of the
shaitng whenever the steam power Is 70 be dispensed
with and canvas alone employed The connection be-
tween the main crank Of the engine and the line SHAFT
ing consists Of two wrought iron clutches held togethse
by bolts and thick gum washers This clutch acts
universal jo MT admitting the most extensive denss
ton of the ship longItudinaliy q seaway, withous
Tho thrust collar Of the Madswasks, A. ia
the DICTATOR consists Of single disc. Il
Contact oss rh the 9us. Sssrnr che n'n isno.s
being constantly flooded with oil, by means of pump
the latter receives the ovcraowing oil which. BY
of the pump, is used over and over the dirt settling
bag at the bottom OF the cstcrn An appropriate bog
incloses the whole The arrangement dispcnses with
tho employment of water boxes aud relieves tho engt-
neer from much trouble.
BOILERS
The Madawaska has eight main boilers for generating
saturated steam and four experimenting boilers for gons-
rating and on ne e as we'll .
sage 70 the engines The steam pipes and stop valves
arranged that the steam from the main boilers
may DO passed directly to the engines without being
Conveyed through tie boilers and its ssS
Sosl. s usy hass
Four are a feet inches long, 10 feet inches vide
iest inches wide. and feet inches high, and twS
arc q feet long feet inches Wide and feet inches
As The Martin plan and contain together osa vertc
brass tubes OF inches external diameter, feet 2
inches average length The bracing y unusually hesyA
pounds 70 tho square inoh. The -four supsrhsstae
boilers 10 feet ecses long feet 10 .nchss Wal
mac. II IN each Above III: furnace SERIES * les ho
.ontal tubes Of wrought lyon, inches extssnal
heated air and products Of combustion mon
the furnace circulate on their passage 70 The
Is generally kept about six inches above The fusoss
LEAVING shs tubes az By Rscs .s 9
dry heated tubes In such manner as eectually take
Up The ssa! Of The Sy sssss snd . before ss stated s
eosed % The 6ss,ias H.~s. o. sls tube. 3: wadis
:srs: Il n. ssys sss .s re-,
drought sproducss without elc.ers BY nesnsef ssgv
ioisi sss'I sss = sss 40 which svpss
A., 4. a .s.,g "a sSsH4' - SA 4. q ~ f ;..I
%ssm Employed RI pscdacss trsasSs TSs sps
the adequacy Of these means, series q hollow tS
duced a the base Or eeob smoke pipe lao which scee
may be admitted In orderto stulase the 1AugA ID The
principle Of the veil known steam blass In Iocoussiw
engines v,s. I'll ..-il.4-i 49,, 81 if,-,. !,
VENTILATION AND CAPACITY TO CARRY CoAh...s
The intelligent reader, on perusins ths forsgoins -
magnitude Of the means adopted 70. ssoersps Ne
i've power. Fly eight furnace! The reelection =
lastf How IL excessive heat In the are roosps b 6
preventedi The last mentioned dicul,y has baon ueo
With he s ro%s and extending e
deck each Pipe being surmounled with rotating hool
q bell mouth SHAPE turned 70 ss Wind q 9xs!d. "
rated the fire With reference 10 the srsok 80
sumption Of coal attending Che Application & sueA
magnificent new screw ships arc, IN fact, smiling
vessels tho steam power being only an auxiliary B6S
line II IS auxiliary power which, when applied, v3l
Europe haze yct put anoai Unquesonaby this PLAZA q
applying the greatest poss BILE amount of steam power "
ant M case war with maritime
THE hadswasks win be rugged ss bark. The IesgA
Of .ho manmast Is ltg feet and stepped on the bssA
forctcp aud fcrstoreailantnas 70 feet; maniopgsank
mast 70 feet forcyard, 50 feet manyard, e5 feet FORE
gallant %saiGssalsns y.ra rs 8 ss IS
gan, 81 feet main ga 90 feet spenkcr boom 90 fsss
d wire rope, Of American manuiaciare. The ranniae
rigging viii No made OF American hemp from the fActor4
Of Wall Soma Williamsburg, NJ Y
THE SAILS 1r eEt
The Madawsska's sails are now bong made Il ~
brooklyn Navy Yard, nader the direction Of GeorgsQ
Bocrum, master saiimsker They will consist Of o.
forcsa1, foreopss, foretopganntssii fore xysa2
fore sisysa d. flying jib mansail mantopsaii, main
,opgasnsali, main tysal, main s,aysa, spanksr gsa
topsail, malntopnast staysai, mixzsn staysal The
sails will be made Of the best American duck saiciotk
The Of canvas 10 be carried by the NadawastaN
twenty i've thousand square feet
H. TIN Armament. l.I
The armament Of Tue Ssdarssks, which viii be Of D
superior character will he put ON board AZ the Brookivn
Madison Mulaney Chief 0fdnahss bmcsr ~ .hs, 49,
~, s consist Of ten nineinch DshIgren shcI runs =
IA 3219yae, w 9as Agpd{cd- FOUNDER Parrot rae1
two twenty fou, geupds losilssrs one twelve pouada