The Oskaloosa herald., 1916-05-04

water js connected by copper tube Il
intake manifold. The suction Of the
intake stroke takes the Vapor with
mixture TO explosion chamber. Pro.
Vidsd the small amount Of water in thG
vapor aets 70 the chamber, will II cause
more power, less carbon and tend to-
ward economy .,...vr s+~ @.f&
There are many theories advanced
for the action Of water I'm the intake
manifold, and all of them are combated
just as strongly as they are advanced.
One of the theories held quite widely
is that the water II entering In very
minute quantities viii be transformed
into steam. which on coming in con.
tact with the Blowing carbon viii form
carbon dioxide. thus cleaning the cyl
inders of carbon. 1t is generally ae-
cepted that no increase In power Is
given by the admission Of water.
There does not seem to be any reason
why the economy should be better.
10 q long stroke motor capable Of
turning over faster than a short
stroke?
No. not so fast. Limiting speed is
piston speed In feet per minute, not
revolutions per minute.
Can you give me The different meth
DDS Of testing the effectuaI working Of
the spark plugs in giving equal and
uniform explosions, and II there is any
variation owing TO the strength orpoW-
er Of tho spark7 49, =.
The operation of the spark plug can
be readily determined by eye. All that
is necessary to do is to place the spark
plug points at the proper distance
apart. which is. between one-sixty.
fourth and one-thirty-second inch for
magnetic use, and then after this up
proximate adjustment is made remove
the plug from the cylinder and start
the engine on the other three. The
color and intensity OF the spark which
jumps across the gap of the plug re-
moved from the cylinder gives ready
clew to its performance when firing n
charge. The spark may vary ali the
way from a thin. fine line to q thick
dot Of fame. Something between the
two, or a hot blue spark. is most de-
sired. .
MY engine refuses to respond or
ehokes down on too sudden and to
wide opening of the throttle. Can you
tell me the cause of this?
The choking action Of which you
speak is generally due to too rich a
mixture. Properly designed motors. un
less improperly timed. do not suffer
from defective suction.
Will you kindly inform me what 10
the matter with the electric lighting
and starting system Of my carr The
ammeter charges az long as | keep the
car running above ten or twelve miles
per hour, but when slow down TO less
than that for a little while and then
speed up to even twenty five miles per
hour the ammeter does not Indicate
charging, but remains at zero, Then
If the engine 10 stopped and started
again the ammeter continues to charge
as before. The car has been run $50
miles, and the test Of the specific araV-
ity of the storage battery 10 about
1850.
1t is possible that all of the connec-
lions are not tight and that they coca
sionally make poor contacts. decreas.
ing the output due to the additional re-
sistance. 1t is also found that oil In
the commutator or brushes will cause
trouble similar to yours. This is due
to the fact that at low speeds the. oil
will sufficiently insulate the brushes
from the commutator so that when the
generator just commences to turn over
and is producing only about one volt
the oil will prevent a circuit so that
the output is zero. At times when
running at high speed the brushes may
be able to touch the commutator, al
lowing the fields to become saturated
and the output normal. 1t Is also pos
sible that the anmeter needle may be
and the vibration of the car
at high speeds is SUFFICIENT to loosen it.
What would cause a grinding noise
in tho differentiaI of my car when
eoastins7 II is all right. when pulling.
The only cause of a grinding noise in
the differential would be. first. a seri,
Gus mfsalignment or maiadjustment Of
the two gears, and. second. foreign
substance in the gear case, Any such
noise as this Is more apparent when
the car is coasting ahead Of the motor,
as this allows the rear wheels TO take
up the back lash in the driving gears.
You should take the car to q flrst class
garage. where mechanic can take up
the play and put the gears In proper
mesh.
What 10 meant BY cast stesl gear,
j drop foreeda Are there vAnadiurn
gears IN use on many cars. and which
OF the three are the best. and, which
costs the manufactures the most TO
producer
A east steel gear Is one In which the
gear is a steel casting. A drop forged
gear is one in which It is a forging.
yanadium steel gears are used on
few cars, but where alloy steel Is used
nickel Is employed to a much larger
extent. The alloy steels are The most
costly Forging is the method gen.
- n 49, 49,.