The Brattleboro daily reformer. (Brattleboro, Vt.) 1913-1955, 1922-09-05

The first showing of the latest six
cylinder Franklin, designated as
Series 10. which is being made this
week in all parts of the country, DIS
closes the new motor about which SO
many rumors have been current III
automobile circles for some time.
From performance standpoint,
mower is the feature which shows the
most noteworthy development in the
Franklin with the new motor. In hill
climbing. this greater power repre-
SCENTS 20 per cent increase in ability,
and in speed a 10 per cent increase,
tests made by the Franklin Company
show. without, however, involving any
change in the size of the motor, but
registering in fact, worthwhile re-
duction in fuel consumption.
Under Way Since 1915.
From a design standpoint, Series 10
Franklin introduces some entirely
new ideas in air-coOling which are the
embodiment of work started by
Franklin engineers as far back as
1915. The cooling apparatus tunc-
tioning on the new motor. and called
the pressure system, is known to have
undergone tests on over score OF
cars. and aggregating 3OO.O0O miles,
before its adoption. 1t develops a cur
rent of cooling air which is fully two
and one-half times that of. the former
Franklin system.
The new cooling system takes the
air i'm Mt the front of the motor and
forces it over the cylinders. This Is
the direct opposite from the method
formerly employed in which the air
was drawn iii by fan set in the fly
wheel at the rear of the motor. 4
blower or fan of the SirOccO type Is
mounted at the forward end of the
crankshaft and encased in an alumni
mum housing The air forced in by
the blower passes through n continual
ton of this aluminium housing, Is car
ried over the upper ends of the GYM
der jackets and down across the cool.
ing fins which are set in the walls OF
the cylinders.
Cooling Fins Changed.
4 change has been made in the cool
ing fins. the ends being bent at APP
proximate right angles so that they
form what practically amounts to
closed Jacket about the cylinders
through which the air is conducted.
This does away with the use of the
separate outer jacket as used in
former models. affords greater cooling
area and permits a reduction in the
length of the fins themselves.
With the new pressure system of
cooling. the air forced i'm by the blower
is absolutely controlled by battle
plates placed in the aluminium pas
sageway already referred to, and this
makes it possible to direct the neces-
sary amount of air to those points
where the greatest amount of heat is
developed.
Fuel Transformer Uses Low Grade
Gas.
To make possible the most efficient
use Of the steadily lowering quality Of
gasoline now offered the motoring
public. the new Franklin motor is
equipped with what Franklin engi-
neers term a fuel transformer. This
device is in the shape of a cylindrical
aluminium casting with corrugated
walls surrounded by a heater jacket
through which the exhaust gas of the
engine is passed. Raw gasoline on
its way to the inlet manifold is led
through the interior of this trans
former and subjected to heat which
turns it into vapor. The device is so
designed that it is impossible for any
to the inlet manifold. Heavy ends
in the gas which were not broken up
or vaporiZed in their first passage
through the transformer are trapped
and returned again to the bottom of
the transformer to be subjected once
more to passage over the heated cor
rugated walls. This operation is re-
peated as many times as is necessary
to produce the vapor. The device af-
lords the Franklin a high degree of
efficiency in the use of the lowest
grades, Of gasoline from being drawn
INTO the cylinders and passing from
there into the crank case to cause di-
luton of the lubricating oil.
Duralamin for Connecting Rods
Certain factors contributing to
smoothness and quietness of operation
have been perfected, among which the
use of Duralamin for connecting rod;
is an innovation. This new material
by cutting off 30 per cent of the
weight of corresponding steel parts
makes possible Il considerable Tighten.
ing of reciprOcating parts. succeeding
thereby in reducing vibration. In tho
same connection. it is worthy of nott
that Franklin engineers were alsC
first to introduce the use of the alumni
mum piston.
Double Flywheel Effect.
The double fywheel effect contrib
uting further to the counteracting o
vibration, results from the mountin.
OF the SlrOcco Fan mt the front ent
and the hywheel at the rear end Of tn
crankShaft. The cpankshaft ifseli
case-hardened by a process perfecte
last year by the Franklin COMPANY
Is made considerably shorter and o
larger diameter than heretofore: it
also mounted on seven bearings.