The Oskaloosa herald., 1916-08-24


pressure that they do when the drive
comes through them in an inverse d.
rection. With a worm and gear this
analogy is quite accurate.
There 10 a crack across the center Of
the driving disk on the friction drive
of my car. What might cause this7
The exact cause would be hard to
find. but possibly 1t was due to put
ting too heavy a load on the drive sys-
tenn. such as pulling out of deep rut.
etc.
am building high speed engine,
q by 6. What 10 the best timing for the
vaIves7 What size fywheeI should be
used?
Open the exhaust about 45 degrees
before bottom center and close at
about 10 degrees after top center. Open
the inlet little past top center and
close 1t at about 30 degrees past bot
tom center. This is merely. a sugges-
ton and might not work out as we'll as
some other timing. 1t would be impos-
sible to state arbitrarily what timing
would be best without knowing the en-
CINE and experimenting with it.
The size of the flywheel would de-
pend on whether it were a four or six
and on other considerations. You can
not arbitrarily fix the weight of the
hywheel by knowing the bore and
stroke.
Will It harm my generator to drive
with the storage battery disconnected?
1t will harm the generator Of any
electric lighting and starting system
to run with the storage battery discon-
nected. 1t Is likely to burn out the in
ternal windings of the electric unit
In which car does IL take the most
power to drive, one with the transmits
sion in a unit with the axle or with it
mounted midway
There will be no difference In the
economy with any Of the three loca-
tons of the gear set. except In so far
as the number of universal joints is
concerned. The fewer the universals
the less the friction at this point and
the greater the economy theoretically.
Consequently a car with one universal,
such as found more frequently in the
unit plant, should be. theoretically.
slightly more economical than those
with more universals.
There L. q knock in my car. The
bearings are tight. The cylinders are
three sixty-fourths inch larger one
way than the pistons and one thirty
second the other. Would this cause
the knock, and, IL so, how shall I bore
and finish them? The cylinders are
four and one-fourth inches in diameter.
This is probably due either to loose
rings or to the fact that the cylinders
are out of round. It would be strange
If there were no noise with the cyl
inders in this condition. They should
be put on a lathe and reground. but
you had better take the car to a good
garage and have it done by a mechan-
&c who has the equipment and knows
how to do such work through expert
ence.
: A peculiar condition has arisen after
overhauiing the motor of my car.
Drops Of water can be seen clinging to
the inside Of the discharge pipe of the
muffIer, and when the motor is running
little drops Of water are occasionally
expelled from the muffier. More wa
ter aeeumulates in the muffIer as fast
az il 10 expelled by the exhaust gases.
The motor has been overhauled and
cleaned out thoroughly inside. Fresh
oil was put in, and there has beer no
chance for water TO become mixed with
the Iubrieatins oil. The motor fires
perfectly at all speeds. Can you tell
me what the trouble might be7
The only cause to which we can
ascribe this phenomenon is the lorna
ton of water as a product Of combus-
ton. 1t might be. however. that In
boring out the valve ports you sprang
very small leak 10 the wall OF the
water jacket. due to thin spit or sand
hole, but from what you say this
seems remote possibility.