The Palatka news and advertiser., 1915-05-07

on my car so that 1t VIII furnisn cur
rent for the lights and start the motor;
then suddenly il will become dis
charged. Where should ! look for the
trouble?
From the information you furnish 1t
would seem that the battery is either
completely discharged or you have
short circuit in the system. 1t would
seem quite likely that 1t is the former,
and If this is the case thorough re-
charge will remedy the difficulty un-
less the battery has been left in the
discharged condition for too great
length of time. If so, the battery
will probably require overhauling. The
symptom for this trouble is exactly
what you describe-the battery starts
the motor and also gives very bright
light for few moments and then ap-
parently is dead.
have an air cooled engine and wish
to thoroughly clean it OF carbon.
Would it be possible to clean carbon
out by putting the cylinders into pail
of kerosene and leaving them for about
a day?
AS long as you are going to remove
| the cylinders it is best first to soak
them in kerosene, as you suggest This
will probably not remove the carbon,
| but will merely loosen it. 1t should
be taken off by scraping with soft,
blunt metal tool such as screw
! I,, nd 70 oh
the corners when the cylinders are re-
moved.
What is the difference in construc-
tion between ordinary and cord tires?
Ordinary tires use Il 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 way as to impart
great diagonal strength, rendering the
tire less susceptible to vertical stress
than with some other constructions.
Will you please explain the difference
between the dual, double, single, two
TENS?
The dual system employs two inde-
pendent sources of current. but Uses
common set of spark plugs and 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 one 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
battery and magnetic current source
are used, but In which the battery is
connected with the magnetic armature
in such a way that it 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 the higher test
gasoline | use the more power get
and the hotter my engine gets. Will
injure my motor by using a mixture of
motor and Illuminating gasoline if the
water crculates freely and does not
boil7 The dealer tells me his motor
gas tests Ga and the Illuminating gas
72-76 and sometimes moro.
As long as the cooling water does
not boil 1t Is certain that the motor is
operating within the safe range of
temperature.
Can you tell me about what the
pressure per square inch is on the pis-
ton of a motor at the time of firing;
also the pressure at the time the ex-
haust valve starts to open?
The pressure per square inch at eX.
plOSiOn depends upon the motor itself
to large extent. but on ordinary four
cycle gasoline engines, operating at
mean effective pressure of ninety
pounds to the square inch and a ter |
illlldi I'tNHu'V vi I'llS Doul.'l Us W Tue
square inch. the combustion pressure |
on 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 fair rate Of speed there is |
a singing noise that seems 10 be on the |
left side Of my gear 5ox, but going up
grade | can run as fast as | desire and |
the noise is rot there. | can give tho |
car good start down grade and free |
the engine and do not hear It any more |
until engage the clutch again. II
does not seem to Injure the pulling at /
all, but il seems as if there were some |
parts rubbing. This has been in the |
car for long time.
From the description which you give |
II would seen that the noise is pro |
duced by the drive shaft piniOn and /
the differeutial gear not meshing prop |
erly. In order TO overcome this it viii |
be necessary for you to install special !
heat treated parts. The fact that the .
piniOn and gear are not meShing prop .
erly causes Il miSalignment which sets |
up vibration. producing the hummins
or singing noise.