The New York herald. [volume] (New York [N.Y.]) 1840-1920, 1864-01-11
Ii.e New Irom-C,ads.

-.
From the London Times.
The success which has attended the adoption OF the
double ar twin screw princlc in England and America
during the past three years has invested Il with great
interest 10 captain Carpenter r. N. we are undonbt
eddy first indebted orthe ntroducti of tho twin
but the frat advance OF moment IN its practical demoustra
tion was made by Mr q Rennie 10 1882 followed up In
1887 by the arm In constructing several gunboas
tue same principle for indian river service From some
cause however difficulties appear 10 have existed for
great seems TO have boon attained the principle
not fol owed up. and strong feeling certainly
isted against its adoption for either mercantile
like purposes The single screw, with all its acknow
edged faults accordingly held its against all
The double versus single screw has been subject
OF strong controversy the meetings the society or
Arts the Royal United Service Institution and other
places where such matters discussed. we'll as OF
lengthy correspondence and editorial articles 10 the pro
fessonal journals especially since the Mcssrs Dudgcon,
OF Mllwai have adopted the principle. and have begun
launch from Their iidnr yard nearly double
twin, steamer per mouth. The doinye az those
vessels on teir trial trhs have boon recorded in these
columns and the Admiralty lave adopted The prn.
c,pe in tho construction OF sone ironrlated gunboas
which are about 10 be laid down Cor the royal navy,
fixing The das Oh med by Their officers from Aessrs.
Drdgcon's trial ~ or thor guide. Through tls long
interval howevc glrai and complete FOR the
twin screws, CaDt,ln Ihcmas T. Symonds, X. y i,
nephew Of SIR WI, Syonds. once surveyor OF the Navy
has been Their rst earnest ard PERSISTENT advocate
and triumph il, in fact, the triumph
the plan that ocor has long advocated. II ia. how
ever doubtful how far At present the Twin may super
sede the single Ia tho royal navy it may possibly
only be Adopted 10 vessels specially built TO carry heavy
armament and large engine power a. moderate druught
or water ana which may DO designed for operations on
limo OF coast or OF arb0rsasa coast defence vessel IN
iactand therefore requirnga rover Of turning shortly
such oa!y two screws give i, il difficult. how.
ever 10 sly where the line BE- drawn fr draught OF
water and powers OF mannuvring OF eq al importance
On the 22d Of Aprl last, at a meeting OF tho SO.
ccty OF Arts. Rear Admiral the Honorable Joseph
Dsnnlnn, who in the chair. said with
ference to our large iron-ciads."lie had no
doubt two or three ships OF smaller size would
Northumberland the smaller vessels possessed supe
ror power OF turning bv means Of double screws
that the Americans have very largely adopted the
twin screws Tor their meu ofwar. The loss OF the IRON
clad ram ndanola WIS attributed by the accounts in the
American papers, TO her 'inablity to manTuvre. The
writer says:-"She ie prey 10 two small guubOats
having power Of turning TO high degree They could
frat side then the other till the mail.
Cd liant beaten 10 DEATH These two Runboats
driven by Twin screws The Naugaucs another Ameri.
can gtnboat il fitted with twin screws and carried
two hundred FOUNDER PARROT gun fixed carriage BY
the OF her screws the vessel is trained at the OBJ
ject, ana the gun thus brought in line of fire. The
John Nelson, vessel used for transporting the mail
trains across tho Delaware river, is driven by twin
screws and has to turn end for end at every trip
order deliver the train at the end it entered.
she two hundred and twenty Ave feet long, and is
stated TO often perform the a strong
rent cho<ed with ice In from one minute twenty seconds
10 one minutc thirty seconds. twin vessel is
building in America TO mount two monster guns OF nifty
tons each. These guns will be liked carriages, Will
be fired ut point blank range aud viii be brought to bear
upon the object ircd at like the gun OF the Nagatuck
by the screws revolving the SHIP THIS tho position OF
the twin system In England and America at the
present timc and the cirl yuoing Anieyica
'ch supply the means o. esng lis us3ntn-ss for ships Of
In paper read by Captain Symonds On twin screws in
April last thar officer alvocstes double kces rnd-
ders for vessels and gives az his reasons
that by applying twin screws 10 single keel ships OF
the present form the intervening dead wood Is serious
obstacle To- their perfect action II divides and materially
the column OF water coming 10 the OF
the screws increases friction, and series OF
shock that produce vibration. The vessels which Cap
tain Symcnds and Mr. Roberts, &. conjontly propose
for construction for twin designed for double
sees with rudder in the line OF each keel and nearly
In line with each screw shaft with the two keels cell
luar aud celluar bottom worked up into the engine
purely professional, and feel confident that with Mr.
Reed the oce OF chief constructor OF the navy, they,
together with the whole principle and adaptation OF tho
twin system, will receive that consideration which
their importance demands