El Paso herald. (El Paso, Tex.) 1901-1931, 1918-03-30
KNOW YOUR CAR! HERE'S THE
DOPE ON COOLING SYSTEM
Popular Science Writer Tells Herald Readers Facts
About Various Types Of Cooling Systems and
How to Check Their Proper Working.


"HE past two years have brought
greater progress in the develop
- ment OF engine cooling than all
the period before Engineers have
learned much about the possibilities
I Of this part Of the car and the or
binary car owner viii be getter for
being informed on the subject.
To begin with the cooling system
l is a necessary evil. Thirty-five per
cent OF the power generated IN the
| cylinders IS disslpated through the
I cooling water. II it were not for the
! fact that oil breaks down and burns
under high heat, we could get along
without the cooling system and save
over third Of the power that is now
wasted However. fabrication is alb
solutelT essential In the internal com
ousuon engine and to maintain the oil
MIN between the various moving parts
we have TO have the cooling system
At the present time there are two
distinct methods Of cooling the en-
B1nes one employing water, the other
air In The air cooled engine, the heat
Is oisslpated through fine projecting
out rom the cylinder In the water
cooled system, the fluid Is kept IN con-
slant circulation IN jackets or COM
partments around the cylinders. The
system includes a radiator. fan and
a means for keeping the water cIrcu-
iatiEg
IN operation the water circuIatss
around the cylinders and then goes 10
the top Of the radiator and flows down
70 the bottom, through the tubes or
cells, giving off its heat on the way
The ian draws air through the inter
STAGES between the tubes or cells and
this alr carries the heat away from
the water without the fan. a much
greater area would be necessary than
could be obtained in the radiator OF a
car
Two methods Of forcing the circula-
ton OF water through the system are
now In vogue, thermo-syphon and
pump Thermo-syphon cooling is
No pump IS used here, the movement
OF the water being assured through
the natural law that hot water is
lighter than cold and consequently
rises TO the top. In this system, as
soon as the engine starts. the water
IN the Jackets gets hot, rising to the
top, displacing cooler water. In this
way the hot water pushing its way
TO the top and the cooler water rush
ing IN to take it's place. starts a cir
culation OF the fluid. sufficient to keep I
Lne engine properly cooled. It is
necessary in the thermo-syphon sys-
TEN that the water pipes be OF gen
erous size and that the radiator be /
placed high above the water jackets. I
50 that the outlet pipe viii slant up
little slant
The thermo-syphon system IS the
simplest method Of cooling the engine 4
anc when properly designed, is ef- 1
lectiTe for ordinary service. It has
not the positive action OF the pump
System. but It does very well. par
ucularly on V-type and horizontal en- |
glness where the radiator may be set I
nigh as compared with the water
Jackets. This system works very Wen 4
In small engines
In the pump system a centrifugal l
pump driven by the engine forces the l
through the system and maintains /
constnat and positive circulation So ]
long a. the engine is running the I
pump must force a flow OF water
through the cooling system. The
pump system IS more expensive than /
the thermo-syphon
The radiator member Of the cooling I
unit. has a tank at the top and an
other at the bottom The core IS the 1
section lying between the two tanks. /
which looks like honeycomb. There |
are two different types OF radiator /
cores, tubular and cellular. In the tu- /
hular type the water passes through |
the tubes and the air IS drawn through ]
the spaces between the tubes In the I
cellular type the air is drawn through I
the tubes and the water flows through 1
the spaces between the tubes.
In operation the water enters the I
tank at the top OF the radiator. where /
IL is baffled so that instead OF flow ]
Ing down one side OF the core, Il IS j
distributed all over the cooling area 1
In the lower tank there is provided a I
means for receiving the water from
all parts Of the core.
Few car owners realize that the j
shape OF the radiator has anything TO ]
90 with the efficiency Of the cooling
system 1t has. however The high.
narrow radiator, such as IS used on
racing cars, gives the water q greater
distance 70 travel downward through
the core and consequently more time
TO get rid Of its heat. II used to hap
pen often that too small a radiator
was fitted in the ordinary car. so that
overheatinE troubles developed but