The Pacific commercial advertiser. [volume] (Honolulu, Hawaiian Islands) 1885-1921, 1899-03-25

cost and expansive 60 keep u fcrs2ss,
requiring c1assaag agssasipa. rcP-2c.tss
% plates and siecsrolytr. IN upz'
pressed air. instead 90 the storage BAT
tsry. there - simpiy Supplied = LsFEs
receiver consisting % STEEL tGbss. TAs
air compressor js Fua az a c1assaa;
sped. pumpiuE tetp this receiver.
From this receiver the var5oss cars
take tA.ir charge. AfscT o1cs ia-
stalled. there il no further bsshss u5sh
10. The cieciric Poueg psaas saE aes.
during rain or snow. UujaE 90 tsc
leakage from The trolley wires aat
other electric arpssatas. are required
to develop from one and oae-haf 60
three times the puucr that is Fccsirsd
under good TuaaiuE cosdissuas. VITA
compressed air. practically no loss cc-
ours with the cxccpgiua 90 possibly =
little siippiuE on The rails aad sss
extra friction caused By sas~. Thcrc
are no losses whatever IN TRANSMISSION.
as 10 the casc nf the trolley. \ con-
prcssor IL simply q pumpsuE cnEiac In
which the tiuid is ai= instead of water.
The Compressed air sYsscm can there
fore BE- operated by the same class of
men that can run a locomotive o. =
mill engine. The air motor on the air
car - similar in design tn that OF = To-
connective. Certainly no simpler device
can D. imagined than this. ror one
more easily kept in repair oT less n-
able to get out % order.
The operation Of an air car - much
simpler than that % an electric car. u
requiring but slight mo;toa of the
wrist to bring the car from full sped
to a dead stop. In an electric motto.
there il first 20 - operated an cleo
trio switch. and then the brake. Thia
is one of the most important advant-
ages OF compressed air. iuakmurh as
there is less liability OF damages 70
sultinE from injuTy to property and TO
life. This has been actually demon
stratcd by the air motor cars that ucrc
operated for one year on iss;h s.. NcE
York City.
Electric people point out a. a danger
the high pressure carried in the stnr-
age tanks on the air cars. "a already
stated the burst uE of one OF these
tanks will not thro~ any metal. and.
unless pcrSoa was directly on the
point of break. NO harm would he
done Those Who have seen mca and
horses burned to death By the breaking
Of trolley wire. have not much TO say
regarding the safety os the trolley sys-
tenn Furthermore. the rapid ssridca
made in the perfection OF the strength
OF materials has reached a very hixa
point. Steel tubing IL made By several
large manufacturers in the world. tho
material Of which - guaranteed To-
stand test inside Of the elastic Limit
OF $500 pounds. the bursting pressure
being more than 5000 pouadA The
pressure carried in street car work in
these storage tubes is bat from 900
to- 900 pounds. giving a factor OF safe
~ of about four. Were water used
under this pressure. the factor OF safe
~ should be greater because water ts
non-compTcssibIc. Air. however. being
an elastic fluid. - cntirciy dsTercas
and nothing can occur by SIS use sim
liar to- what IL knoEn az waterman
mcr." or ~hydraulic-ahocks- occurring
in usc of water under pressure There
- not aS much danger in usinE an air
pressure OF 900 pounds. az there il
IN n boiler pressure Of i.0 pounds. One
hundred and eighty pounds. steam
boiler pressure. - being uscd in several
OF the pumping plants IN these IaiandA
The writer knows that there arc
movements ON foot In several Of the
large cities towards the Installation os
air motors for city and Suburban work
eAAAA AAN4ANAN kAAk AtNN IMAM r1rrN
years the afr car service will have
strots public approval q must 30
taken into consideration that there il
a large amount of money az present in
vested in electrical equipment and that
the cost to investors to change their
present systems would be cnornous.
However. public sentiment and soWcr
cost OF operation will 5000 cause com
pressed air to be installed
\ point OF advantage OF the uzrdie
system OF air cars is that the pouad
on the track IL much less than for an
electric motor OF the same weight
This IL due to the diffcrcacc of the
blow ut a spring supported and OF a
riEidly mounted load. whcn passing
over an obstruction one-ssEhth OF an
inch tn height at a speed % ten m les
per hour. the blow struck viii bc about
scysn times harder for an sisciric
motor than for an air motor. There
fore. for the came weight % rail the
streets % city will not b. disfEurci
as often in the ease % the aiF Eysictn
as with the electric.
There are several forms 90 air mot
oTs. the writer much prefcrginE the
HaTdie on account 90 It's mechanical
simplicity as well a. economy ia oper-
alton.
To sum up tsrsciy: u e. an iate-
pendent motor. under quick cuatFoi
no scless. az reasonable cost. % hiEa
efficiency. free from danger and OBJ
icctiouabIr feature. 1t 5s The most
economical system iu cost of lnEtaIla-
ton. operation. and matnsce ancc. O.
has been thoroughly tested. both ain
ter and summer. and ia endorsed By
many Of the most prominent enE!necrs
in various parts of the eountry. r. o.
for this reason that the writer. 80 The
request of many friends. has vrittss
the above article In hopes that % may
Be % some assistance IN Determining
for the people of Hnuo.uiu shat street.
car system they Will svsntnsiiy adopt