Atlanta Georgian. [volume] (Atlanta, Ga.) 1912-1939, 1914-04-05
MAXWELL MOTOR
COMPLETES 300
HOUR TEST RUN
Remarkable Record Attained by
25-Hor8epower Machine in
Severe Work

Three hundred hour tests have
come 70 be quite the fashion now
adays among motor car makers in
demonstrating the running qualities
and stability Of their product To
date practically all motors subjected
10 this strenuous form OF test have
been included IN the high-priced
class. Now comes chief Engineer
Benner. OF the Maxwell Company,
with details OF recent 300 hour trial
given a Maxwell "25" motor in the
Detroit laboratory Of the company
THE test was staged merely as d
private performance" says Mr.. Ben
nar But / believe the results are Of
sufficient Importance 10 make public
as tending to show the worth Of the
low powered motor contrasted with
the most expensive types on tho mar
iIet. We may decide at some future
time TO repeat tho test officially under
the auspices Of tho Automobile Club
OF America or the A. A. A.
Placed on the dynamometer stand
on Tuesday. the motor was put In
operation at p. m. and ran continu-
oualy until the following Monday
morning when stopped az Q a. m. on
Monday the motor had run 807 hours,
or an equivalent ~ 1875 miles Dur
ing this period the motor was sub
iected TO n load Of ID horsepower and
operated at a speed Of 1000 r. p NJ.
Expressed In terms more intelliglble
10 the lnyman this would pun the
car with It's fun load of five pessen-
gers at rs milee per hour. for 507
hours.
Gasoline Line clogged.
For the first three days Of the test
the only adjustment needed was the
replacement Of two spark plugs. On
the third day the gasoline line be-
came clogged and the motor was kept
running for several hours by hand
feeding Of gasoline into the carbure-
tor The gasoline pipe was taken
down. cleaned and replaced. but again
ciogged after twelve hours running,
due to impurities in the fuel This
time the cleaning of the pipe was ef-
fected IN I'VE minutes time without
affecting the readings on Saturday
another spark plug was replaced, and
from then until Monday morning no
further adjustments were necessary.
Following the long run, Chief Engi-
neer Benner had the motor taken
down for examination. Despite the
fact that the motor had been run
longer than an average year in tho
service Of an owner. the wear was
lmperceptihie Tool marks still
showed In the cylinders and the
greatest actual wear amounted to
seven ten thousandths. Connecting
rod bearings we're in perfect shape,
showing absolutely no wear, and this
condition held true OF the push rods
and main bearings one Of the best
Indications OF the slight wear that
took place in the moving parts WAS
the fact that more horsepower was
obtained at the close Of the run than
az the start.
In his final report on tho test Mr..
Benner says: This trial has proven
10 my complete satisfaction that the
motor OF low horsepower rating. II
properly fabricated. win stand up AZ
well as any motor on the market, and.
believe. produce more horsepower
per pound. The examination shows
no part OF the motor which could be
hettered by replacement and the tess
could undoubtedly have been pro-
lonRed TO twice the length OF time
scheduled without any major adjust
ments."