The Washington herald., 1921-07-31
new PlSTONS ARE
fine FEATURE FOR
ALL COLE MODELS
Constant Clearance I'm
der All Speeds Assured
BY Improvement.
PREVENTS STICKING
Reveals Greater Value of Cole
Aero-Eights at Lower
Price.

Cole Aero-Eights, even though re-
dueed in price $500 to s455, actuallq
. cost $500 more to build than any
previous model.
Exclusive refinements and i'm
provements which make the new
Cole the greatest value this COM
pany has ever produced are the re-
suit of J. ]. Coles Interpretation of
the present demand as something
more than a mere reduction in price.
To those building for permanent
success rather than temporary ad-
vantage Mr.. Cole believes a reduc-
tion in quality in keeping with the
reduction in price will be fatal. The
advance of the motor car toward me
chanical perfection must continue.
Can Meet Demands.
only a company so fortunately
situated as is the Cole. with it's large
resources and its opportunities for
manufacturing economies, due to
large, well organized facilities, can
with car greater in quality than
any previous models.
Chief of the refinements in the
new Cole Aero-Eight, which make it
cost $500 more to build. is the con-
stant clearance piston of aluminium,
with which. official tests have prov
ed. new and unseasoned motors can
be operated at maximum speeds
without damage to motors.
The tests of the constant clear
ance piston, designed and construct
ed by the Cole Company, were held
on the Indianapolis speedway under
official A. A. A. supervision. Three
new cars were used.
Proved by Tests.
The tests proved that pistons can
be so designed and constructed that
they will be uniform in size and in
terchangeable from one motor to
another without the tedious process
now universal in the industry OF
tapping in.
With the new constant clear
ance" piston there is no fitting by
hand by expert mechanics. They are
simply slipped into the motor. solv-
ing at one and the same time not
service problems, but one of she
most expensive as well.
The interchangeability of the new
constant clearance" piston was
demonstrated at the indianapolis
speedway on the second day of the
tests run there.
On the second day the motors of
the three new Cole Aero-Eights used
were torn down. The piston assem-
blies were extracted. A. A. a. Tech
ynical Representatives Chester Rick
er and W. c. Buser redistributed the
pistons so that no car received the
same pistons it was equipped with
originally.
Pfstons All Changed.
The motors, with changed piston
assemblies, were then re-assembled.
Two mechanics in one case had the
motor in operation l hour and 35
minutes after they started. a trib-
ute to the accessibility of the Cole
motor. All of the motors were re-
assembled and in operation in less
than two hours.
The cars W ere put through a series
Of accelerat. Ii tests from 10 to 10
miles and operated at maximum
speeds for sustained periods. De-
spite the fact that no car had its
, original pistons. the performance of
the day before was duplicated in
every instance. and bettered in some
cases.
In the high speed tests there was
To seizing or slapping OF pistOns, and
measurements taken on the third
day. following the tests by A. A. A.
representatives. proved that bear
ings and other working parts had
not suffered in the slightest.
Average of Three.
age of each car for six tests was
taken. and the grand average for the
three cars and eighteen tests figured.
II was found by A. A. A. repre-
sentatives that acceleration aver
ages for each of the three cars was
less than three-tenths of a second
OF the grand average of all thre"
cars, showing 4 convincing Uniform
ity Of performance.
The high speed tests showed an
average for the three cars Of 61.S
miles per hour. And these speeds
We're sustained for haIf-mile periods
without damage to the new motors.
THE new piston marks a great ad-
vance in Internal combustion engine
performance" Official Representative
Chester Kicker of the A. A. A. said
after the tests. The results mark
the piston a real mechanical achieve
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