The Brookings register. [volume] (Brookings, Brookings County, S.D.) 1903-1971, 1915-05-20

have an air cooled engine and wisI
10 thoroughly clean il Of carbon
Would il be possible to clean carbon
out by putting the cylinders into a pal
Of kerosene and leaving them for sbou'
. day7
As long rs you are going to remove
the cylinders 1t is best first to soal
them in kerosene, as you suggest. Thii
will probably not remove the carbon
but will merely loosen it. 1t should
be taken off by scraping with a soft
blunt metal tool such as a screw
driver. 1t should not be hard to reach
the corners when the cylinders are re-
moved.
What 10 tho difference In eonstrue-
tIon between ordinary and cord tires?
Ordinary tires use a fabric carcass or
one made Of a tough grade OF duck or
canvas, while cord tires are built up on
a cord carcass, the latter usually being
woven In such a way as to impart
great diagonal strength, rendering the
tire less susceptible to vertical stress
than with some other constructions.
vii. you please explain the difference
between the dual, double, single, two
point and duplex electric ignition sys-
tems2
The dual system employs two indie
pendent sources of current, but uses a
common set of spark plugs and a com
mon high tension distributor. The dou-
BILE system employs two independent
systems throughout, with two sets of
spark plugs, two sources Of ignition,
two coils and two distributors. The
single ignition system has but one
source Of current, one transforming
system, one distributor and II set Of
plugs. Two point ignition is where
two sparks occur at the same time in
the cylinder. 1t must Of necessity,
therefore, involve two sets of plugs and
synchronized distributors.
Duplex ignition Is that In which both
a battery and magnetic current source
are used, but In which the battery is
connected with the magnetic armature
in such a way that 1t can produce a
high tension spark by means Of the
secondary winding of the magnetic or
aid the primary at low motor speeds.
have found that tho higher test
gasoline use the more power I get
and the hotter my engine gets. Will |
injure my motor by using a mixture of
motor and Illuminating gasoline II the
water ciroulates freely and does not
boil7 The dealer tells mo his motor
gas tests "a and the Illuminating gas
72-76 and sometimes more.
As long as the cooling water does
not boil It Is certain that the motor Is
operating within the safe range Of
temperature.
Can you tell mo about what the
ton of a motor at the time of firing;
also the pressure at the time the ex-
haust valve starts to open7
The pressure per square inch at ex-
plOsion depends upon the motor itself
to a large extent, but or ordinary four
cycle gasoline engines, operating at a
mean effective pressure Of ninety
pounds to the square inch and a ter
minai pressure of forty pounds to the
square inch. the combustion pressure
on a good average card taken by the
Monograph would be about 800 pounds
to the square inch.
When running on the level or down
grades at a fair rate Of speed there is
a singing noise that seems 10 be on the
left side Of my gear box, but going up
grade ! can run as fast as l desire and
the noise 10 not there. can give the
car a good start down grade and free
the engine and do not hear il any more
until engage the clutch again. Il
does not seem to injure the pulling at
all, but II seems az IL there were some
parts rubbing. This has been in the
car for a long time.
From the description which you give
1t would seem that the noise Is PR.
duced by the drive shaft pinion ard
the differential gear moi meshlng prop
erly. In order to overcome this 1t will
be necessary for you to install special
heat treated parts. The fact that the
pinion and gear are not meshing prop
eriy causes a misalignment which sets
up vibration. producing the humming
or singing noise.
Why and how doss . four cycle on.
zine back fire in the intake manifold
from . lean mixture when the engine
10 cold and spark rstardedf
A mixture which Il too lean may not
explode. or. II It does, the explosion
will be a poor n in which part Of the
mixture burns slowly with a flame.
The fame sticks to the cylinder wall
until the Inlet valve opens. and then
the inrushing fresh charge also IL ig-
nited, causing q explosion Of the
Gases sln the inlet manifold and mixing
chamber.
would like 70 know whether I could
nok Substitute = elk volt storage bat |
~ TIE four dry cells used fer L.
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n61hcx thar 50 70 the expense Of a