New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1885-08-02

gwen power. and the custom IS TO make these ua -.
different powers and thus obtain speed ana power
This consider the only satisfactory methoa o,
measuring the speed and by such record our m
showed that the Dolphin should mako from 1910 10 10
knots an hour for 1900 Indicated horse power ~ sn
load displacement of 15o0 tons with clean m No.
the trials which the Board made on the Dolphin on NJ
vember 90 making 1873 knots. at 2I9 tons win n
saed horse power and s SS G sons with IT'S
indicated horse power. leads us to believe ' sh
our calculations would be f1nsa alp The speed
Of long compared with that over the % 49,
engineower than the action OF the sea and we con,
slider that the requisite power can DC mah.,heu 80
ent design to make sevexteen and onehaf
knots, which would require $500 TO 3,60o nn'va,a
horsepower, whereas our maximum Is 3oO "nsh VIZ
come TO examine the OF the speed made on thesc
later trials of the Dolphin, they are IN severa ~
the trials and tho corrections for tide are made ~ ah.
arbitrary manner that We hesitate to ba 20 any co
distances, readings OF tho log and the assumed
corrections for tide Again we . Gon''ae state
inent. in such an important matter tho speed Of
the Dolphin from the rrsutsigven by single
which may be typographical errors as they 90
not appear to admit OF explanation For the traI o o.
May - the speed Is given thus speed Oh pate' rs
as substantially confirmed by bearings l493 Kho'' VI"
corrected for tide 1i6 knots" .,u.,x
read 1913 knot for the tx hours II then appears tnaa
this has by some corrections not stated bee
speed through the water or the tide speed is W
hesitate to say intended to misead, but IL Is
certainly an entire novelty III navigation
In relation TO the indicated horsepower concerning
which sperton OF the examiners report Is quoted 'e
Board say:
great efforts made by the contractor and MS lhen
to show the utmost power which could be devei9pen Is
sustained by the steam log or tho trial. for tue .se
stands actually that the revolutions OF the engines a. ne
eesnnps and al s se arI % the
20 per minute nc the end The steam pressure Ienanc
very constant throughout but tho blowers 10 assist e
aItyht W.. natn ulV Due-laf
tive out OF six hours OF the run. showing tfa az n
steam needed for the desired piston speed was
that there was noSish or attempt 10 eN
coed 1t. In fact. We have reason 10 Dehs.o lnas
no chance for u the hot Journals OF the Two
preceding trials. gave ins urtons that the I poWsa
should not he attempted; this regret. for believing
that the ship Is amply strong, and knowing thAt thc
parts Of The Journals aud pins are well proporoncu LOT
higher speeds OF piston think thaS II 1t were possible
10 heat the bearings merely 10y forcing the engines ~
ought have been done TO run water on tue crahks
is prccaution adopted In all steamers running al hgh
speeds. All the high power Atlantic liners run water on
the Journals from one side OF tue ocean 20 tne o,e ~
WE should never expect 10 run IuA power ui"' VI
new engine without water. a., ,
Tine remarks quoted above as to inc inc, ia ,'on
results of such trial one can
service under varying conditions OF wind ana seh' arc
gratuitons We prescribed certain standard trial Tor
ecniiye h"nrs in smooth water enc recognized ~ Gov
ernmeLis aud commercial bodies thro ghout tue worui
We expected to measure the power and nothing more
the contractor does not supply sea-gong qualities. nor
Is the lX-hOur trial 10 test hcm Inc engines were u
but with course. due regard To durability the last
trial showed that tue power foil per cent O.o" gu,
estimate: are not satisfied that this was tho Dc-l
performance with the present screw but we CON
slider the result as II u.s. one Tor cOu.r"tualoh iae
than condemnation.
Concerning the examiners criticisms the general
design OF tho machinery tho Board continue their re-
view by saying;
The vague imputation that the engines and machinery
are OF incoDvrnient design and 80 inconvoneniy
located and arranged require much more tnan tho
usual number of snc and nreroom force I" properly
facts Inc engines diner but slightly from the usual
type OF vertical inverted engines. aud their arrange
ment affords unusual tacli les for making every part
accessible while the engines are IN motion ana iOT tue
usual examinations and repairs. IL is IL 10 30, DO
Direct acting doubleeynder snenc in the United
weight Of engine IN greater nep,rv 'ha ana I my
Indicated lorse-power developed per square
foot OF crate exceeds any data obianable from any
American vessel excepting an cSccptionai small yacht
OF torpedo boat
REPLY OF THE BOARD or EXAMINATION.
The Advisory Board also comment upon many other
PORTIONS Of the report concerning matters
Of comparatively minor Importance Tho reply Of the
Board OF Examination TO the Advisory Boards crit
ci.ms is dated yesterday. II says:
The Advisory Board has taken fifteen printed pages
10 show that tho Dolphin ought tn be " strong.
stanch vessel that il. that the plans provide Tor
aud their defence OF the vessel and Der builder good
as could be made under the circumstances. bat from
some OF lhc licto htas'H W 80
ent conclusions. As stated In ia report OF
examinations. this Board Is satisfied thnt inc
strength of the vessel can be shown only IN one
of tvs, waystear her TO pieces send her 10 sea Ia
heavy weather II the supervision and INSPECTION Of the
ton can be inken criterion Dy which 10 Judge tue
frame aad fastenngs Amount OF plans aud spcc
nr.tion- and no argument matter how full OF quota
no. from The Proceedings OF tho Institute OF Sayal
Architects" can mako her strong and si"nch. We
AGREED with the Advisory Board that she should have
been strong aud stunc. but We are CT the opinion thtt
many OF their departures from oyds were not eal,n'
49,. A Itta IF
Dolphin was dockcd after her socalied sea tnal she
showed unfair line. on some p'rts OF her
moved TO he Strengthened. curious condition
was disclosed aud well worth the serious attention OF
tluse r.sponr br for her ectOn some OF the spaces
wcsn her frames found to be covered To very
considerable thickness with aconglomcrate formed OF
chps and dirt Of various descriptions, aud on top
OF As undesirable coating for steel plate the cement
was Lad After the plates were removed IL took -ors
limo In d out tins dirt which in some places moist
aud nucky. In order TO break through the ernrnt
whether the bottom Is In tins condition Tore aud Az can
only determined by taking up the conent and making
The cfpiesn OF thus Board was generally addressed to
the fact that is weak structnry without regard To
what she ought TO have been by her desig and stated
nrop-ry be attributable To her plans The Board Of Tx
animation 10 stu Of this opnlaf: ..,.,
trial the Advisory Board say due To the tightening
of the bra ,ses. II was Of thc opinion, then. ana
, H,ar of Examination IL sil of the opinion tuat the
extra weight ad ts distribution caused tho heating OF
lie Journals NAcn indications OF weakness appeared
10 n lie Board requested OF the secretary trial at
me hdyisory Board page OF this statement. seems
10 admit the wisdom OF this request sugscsting that
they well that there IL nothing moro certain
To bring to lite any latent defects which may exist Ia
VESSEL local structural than heavy weather at
sea ana that these conditions weakness may do
yeOp Itself In ships which appear To be strong ana we'll
built" In answer TO ITS request for sea trial The seer,
ary advised II that under tie contract the conditions OF
he trials were left TO the Advisory Board largely aud
thai he DOUBTED his power to exact sea trial. The Board
wing red Long Island Sound The placr OF trial lie
subsequently informed IL that he had re-
ouested the Advisory Board to unite with
h,,n I'm requesting "A sea trial hut that they
had refused IL was therefore. Obliged to take what II
coud grta six hours run In smooth water under the
New-Jersey shorc-Lo test whatever.
Tho Examining Board specified that the bows OF the
s we're weak. The Advisory Board expresses the con
frary opniOp, bur admits that "a short aDgleron stif
fener was shown the original drawing about this
IocatIou but n became incOuyrncnt TO III It,"