The Washington herald., 1921-07-10

defined exactly. IL means the ae-
ity Of oil needed by the individual
part, supplied in the proper guam
tity, neither too little nor too mucn'
and changed with sufficient IRE
quency to keep 1t in condition TO
function properly. This latter CON
dition carries with 1t the fmphca-
tion that the crank case or other
part shall be flushed out with kero-
sene before new oil Is put In. FROM
all this IL will be seen that the car
owner must devote some study 10
the particular needs of his particu-
lar vehicle in order to master the
fabrication needs Of the car. :
A steel ring just the diameter OF
the cylinder bore Of one end ana
tapered on at the other until 1t is
Just large enough to slip over the
piston ring makes It easy to get
piston back In the cylinder. obviat-
ing, as it does, catching OF the rings.
ExpIains Great Reduction.
What is meant by gear reduc-
ton on high? What relation mas
the speed of the motor to its power
and performance!
The term gear reduction refers
to the ratio between the NUMBER
OF teeth in the gear to those OF
another gear. The gear reduction
on high is the ratio between the
number of teeth on the dinerentiai
ring gear and the driving pinion.
Thus 3 to / means that there are
three times as many teeth on the
ring gear as there are on the pin
ion. This means that the engine
turns over three times to one revo-
luton of the rear wheels when the
gears are in high. .. As the en-
gine speed increases the power in
creases Up to a certain point called
the peak. At this point the engine
has reached it's maximum power.
although the speed may be fur
ther increased.
have a great deal of trouble
with my engine-driven tire pump,
Even when new the pump was lit
tie good. and 1 have about come
to the conclusion that the hand
pump is the best of ALL Moreover,
II is nuisance to be lifting the
hood and making Connection when
ever a tire is to be pumped in.
The pump which you have is
probably a very cheap one, because
a well made and properly installed
engine-driven pump rarely gives
trouble. However, the next best
thing is a pump driven from the
forward end of the crankshaft. This
pump is carried in the tool box
and requires but a minute to be
placed in position in place of the
starting crank. A good hand pump
always should be carried. Get q
two-cylinder double-acting one.
Gives Better Cooling.
Question-Would it benefit the
operation of my 1916 runabout to
Install a V-type radiator? 1 have
been told that this type is more
efficient than the ordinary nat ra-
diator. What do you think? G.
| Answer-It is claimed that the "
type radiator gives better cooling
effect. simply because 1t has a great
er cooling area than the nat type.
Undoubtedly the v-type cuts down
the wind resistance somewhat. Be-
yond these and the appearance,
which is liked by many people, there
will be little difference in the two
types.
Question - am having trouble
with a metallic ringing sound be-
tween the universal joint and the
axle OF my car, which makes it's
with clutch out. Can you tell me
how to get rid of It'll. C. H.
| Answer-Try tightening the dust
collar on the universal, and i am
pretty sure that the noise will
vanish.
Question-Is the distributor of the
magnetic timed with the breaker
points on the armature?-H.
Answer-Yes. If the magnetic is
connected with the drive SO that the
points separate when the No.
cylinder is in firing position, the
| distributor arm must be on the No. !
segment.
Due to Poor Mixture.
ouestion-My engine seems to
run all right when standing, but
as soon as 1t is called upon to bear
load IL seems to lose all pep"
and the best l can get is about
twenty-five miles an hour. Also
does burning out your carbon by
oxygen hurt the engine?-K. F.
Answer-There is no question
that your trouble is caused by poor
mixture, and from Indications / be-
lieve it is too rich. Your carbu-
reter is adjustable and il you will
turn the needle as far down as II
will go and then turn II back two
turns you can get a fairly good
mixture, which can be further
changed by other adjustments. Run
as lean as possible. II after max
ing the adjustments suggested you
still have trouble, write me again.
As to burning out the carbon in the
presence of oxygen, this will not
injure the engine if the work is
properly done. OF course even iron
when incandescent will burn in an
atmosphere of oxygen. but there is
little chance of a rough spot on the
piston or cylinder head becoming
incandescent. You should be care
full about spark plugs when using
oxygen. the better way being to re-
move them and plug the holes, or
feed the oxygen through the spark
plug holes.
Question: have a great deal OF
fuel trouble and have not been able
to find the cause. A mechanic
looked o7er the carbureter, said 1t
was o. X. and the motor even runs
fine for him. When / get on the
road the motor dies because 1t
doesn't get gas to the carbureter.
Does the vacuum tank ever give
trouble?
X. Y. z.
Answer-Vacuum tanks rarely
give trouble. but even SO. in your