Aberdeen herald. [volume] (Aberdeen, Chehalis County, W.T.) 1886-1917, 1917-04-24

not the larger one too much like an ee.
centric7
The larger diameter crank shaft would
give the more power, as 1t would offer
the greater rigidity, which is one Of
the big aims in motor construction.
The increase in angularity or eccentric
ity you speak Of would not occur, as
the center Of the crankpin will be the
same distance from the center Of the
crank shaft irrespective Of the diane
ter Of the pin bearing. It Is only
question Of having enough crank case
space to accommodate the larger parts.
With the larger diameter shaft you
get more bearing surface and conse-
quently higher efficiency.
On opening . storage battery which
was out Of order found In the bottom
and extending UP about one third on
the plates Of Il . gray jelly substance.
What 10 it and what b the cause Of
such an accumulation
The accumulation may have been
mud accumulations formed from de-
posits by the disintegration Of active
material from the positive plate. This
accumulation is due to the gradual dis.
integration of this material from charg-
ing and discharging and also to mate
rial getting loosened by vibration.
What are the advantage and disad.
vantases Of the splash system Of Iubri.
cation7
The chief advantages of the splash
system Of fabrication are its simplicity
and inexpensiveness. The chief dis
advantages are that the amount Of oil
supplied to the cylinders usually de-
creases as the motor speeds up, where
as the amount of oil should be increas-
ed. This is because at high speeds the
oil does not have time to settle to its
level before the.connecting rods come
around again and they do not dip
enough oil. In some motors this is
compensated for by lifting the oil
trough as the throttle is opened or as
the engine speeds up.
Kindly inform me Of the relative msr.
its Of the oevsrai types Of gasoline feed.
Gravity, vacuum and force feed, by air
pressure. ! have air pressure feed and
am always uneasy about leaks develop.
ing. Can one feel more secure with
other types or 10 he warranted in feel
ing greater seeurity7
Gravity feed, though usually eff
cient in level districts, sometimes fails
to give best results when ascending
steep grades. Even If entirely efl-
cient gravity feed requires location Of
the main gasoline tank either in the
cowl or under the front seat, locations
both dangerous and inconvenient.
Pressure feed requires an elaborate
system Of tubing and pressure pump
and needs constant attention on the
part Of the driver. Leaks are fire.
Quent. Its construction permits carry
ing the gasoline tank in the rear,
where it belongs, while at the same
time forces the gasoline to the car
buretor faster than needed, resulting
in waste because Of unconsumed gas.
Vacuum feed permits carrying the
main gasoline tank in the right place
that Is, in the rear-and carries gaso-
line unfailingly to the carburetor with
out attention. A saving of gasoline
consumption Of from 10 to IL per cent
is shown over pressure feed, although
no saving is shown over gravity feed.
Can you tell mo the cause Of q slieht
| grinding noise in the transmission Of
my carr Il 10 snost noticeable in first
and second speeds. 10 Il caused by
worn bearings?
The grinding noise is probably due to
wear in the gears and not to any bear
ing wear. If your clutch has been in
the habit Of sticking and not releasing
completely, due to its being slightly
out Of order, the gears have been spin
ming when the shifts were made. with
the result that the gear teeth are bad
| ly buried and worn. Nothing will
make more unpleasant grinding noise
than old gears under load. The fact
that you do not notice this noise so
much in high is an indication that 1t is
gear trouble, as you are not driving
through the gears then. There is no
remedy except replacement for worn
gears.
| What would be the effect Of . salt
water solution on different parts Of q
motor? Please tell me whether or not
IL 10 injurious and how.
You undoubtedly refer to salt wa
ter solution when used as a radiator
anti-freeze. You may or may not know
that the hardware, propellers, ETC., on
ocean going yachts are made Of bronze
or brass because Of the fact that iron,
no matter how dressed with paint, will
quickly rust, due to the action Of the
salt water. The same trouble will oc
cur if it is used in a motorcar engine.
; What 10 meant by piston dispIaee-
ment and how is it figured?
The amount Of space in the cylinder
between the point where the top Of the
piston comes on the top of the stroke
and the point where the top Of the pis-
ton comes on the bottom Of the stroke.
1t is figured by squaring the bore and
multiplying by O.7S54 times the stroke
times the number of cylinders.