Tonopah daily bonanza. [volume] (Tonopah, Nev.) 1906-1929, 1914-11-11

~The exploits of the German cruis- Z
ers. Emden and Karlsruhe" remarked
II. H Westinghouse, illustrates the I
great importance of speed in com P
merce destroyers. They have been
too fast to be caught. 1t seems to
me Inevitable that in building such I
vessels hereafter the navy depart
ments of the world viii utilize geared
turbines. because OF their ability 10
produce high speed at much less cost
than possible under other styles of
turbines or with reciprocating en-
sines. A further advantage is that ;
the eeonomizing of space and weight
reaulred for the machinery makes It
possible to increase considerably the
gun power or armor protection oil
naval vessels. The geared turbines
can also, with perfect safety. be start
ed cold and brought up to full speed
at once a quality that all naval ex'
perts will recognize as OF the highest
Importance in war vessels.
within the last few years" Mr..
Westinghouse continued, "the turbine
has driven out the reciprocating en-
CINE on land. We have about reached
this same stage at sea and here also
the turbine will supplant the recipro-
eating engine.
Mr.. Westinghouse said; we must
; start with the engineering fact that
the turbine demands a high speed
whereas the propeller must run at
:, a low speed to attain the best re-
sults." He then referred to an au-
thoritative article by w. s. Smith in
the last issue of international Mar
0, inc Engineering" in which the gearen
turbine was applied to the great Ham
burg.American liner Vaterland in the
loretical substitution for the steamer
q. present directly-conneeted turbine
equipment to show the advantages 70
no derived from the former. The Va.
terland's propellers have a speed Of
100 revolutions a minute. giving
propeller efficiency of about 50 pei
cent. The geared turbines. with
propeller speed OF about 1870 reyolu
lions per minute. should without oil
; hculty give an efficiency OF 65 pc
cent Applied to the shaft horsepowe
} required on the vaterland for the Ell
? fective propelling power OF 1920. tn
I geared turbines would reduce IN
B requisite shaft horsepower to $3.50
7 saving $500 horsepower, or IA pc
2 cent The efficiency of the turbin
2 itself is also sacrificed where II
s turbine and propeller are direct
connected so that both reyolve at u
same speed.
4 The speed OF the present TURBINE
s is l70 revolutions per minute, wher
8 as the geared turbines give mes
2 speed Of l,725 revolutions per minut
4 This would give o reduction in Z
IS steam consumption from us poun
20 per shaft horsepower per hour to
a pounds, a saving Of "a per cent. Ae
u ing the improved propeller efhcieR
)6 would make a total reduction
a steam consumption of 80 per cent
Ds the turbines alone and 2s per cent
all machinery.
With geared turbines there WOO
or be a saving OF about 80 per cent
NJ the Yaterland's engine room, Z
total weight OF machinery would
reduced about 5000 tons. or about
80 per cent, so that the first cost OF
machinery installation would rep
sent saving of about 100000.
luM the reduction in weight OF machin
and COAL and the space reqni
a. therefor the cargo capacity would
increased by about $500 tons. rel
senting a potential additional earn
- power of about 100000 year c
consumption would be iessened alb
$50 tons a day, which. with coal
1925 per ton, would save 5000
voyage or about $162 900 year.
ing to the reduction in boiler pc
"a to and coal consumption. the fire re
Gals force could be reduced one-fourth
yrna. numbers. t,Rus saving in wages
subsistence about $31. 300 year f
the operating expenses. Due to
smaller machinery Installation
lrent IT'S less hrst cost ~ may "
90 n that there would be saving ~ s
wins 900 per year in interest, insura
depreciation, repairs, etc.
The aggregate OF these savings