Aberdeen herald. [volume] (Aberdeen, Chehalis County, W.T.) 1886-1917, 1917-03-16

I IN strainins gasoline ! have had trou-
BILE with lint. What is q good protec.
| ton against it?
siderable quantity. This lint Is de-
rived from the cotton strainers through
which the fluid is passed in its process
OF manufacture, and traps will not
catch it. 1t must be caught by fine
| screens or by chamois strainers. These
screens in time clog and refuse to pass
the fluid. On metal screens the layer
Of lint can be easily seen and lifted off.
An exceedingly practical protection IS
large tubular screen soidered to the
tank outlet cock and sticking up into
the tank. The flow into the carbure-
tor, being much slower than the move
ment Of the contents Of the tank un-
der the motion Of the vehicle, permits
the lint to be washed off the screen
instead Of collecting in liquid tight
layer thereon. Then the large area Of
screen prevents clogging oftener than
once per year perhaps.
y
10 its advantage over other types?
A live axle is one which is part in
the transmission Of power and hence
is in motion during the time the power
is transmitted. 1t is the opposite Of a
dead axle, which merely has the func-
ton of carrying the wheels and which
does not revolve with them. With
ic fn
power back to the wheels by means Of
chains whereas with the live axle the
more silent shaft drive can be used.
There is a knock in the cylinder Of
my car which ! can stop only by re-
Harding the spark lever as far as It will
90 and keeping it so, no matter at what
speed the car is going. What is the
matter?
You have not said whether you are
obliged to retard the spark SO far that
the power is reduced. 1t may be that
the spark linkage is connected up SO
that the spark ordinarily occurs too
early and that the lever must be re-
tarded all the way before the spark &C.
ours in the proper place. IT this is the
case, change the setting Of the spark
linkage so that when the motor is
cranked slowly the spark occurs at
dead center with the lever retarded.
Vary the adjustment Of your carbu-
rotor with the lever halfway advanced
and then note whether the knocking
continues. Crank the motor slowly and
note which cylinders offer small resist
ance to the pull Of the crank. If all
valves, pistons or rings, but it one or
more are weak you should take your
car to q repair shop and have the trou-
BILE fixed.
Remove the radiator cap while the
motor is running and note whether the
circulation of water seems free; also
feel the various parts of the system
and see whether the temperature is
fairly uniform all over the radiator and
piping. Big differences in temperature
would indicate lack Of circulation,
caused by sediment in the water jack
cts, loose pieces of hose in the passage
ways or dirt in the radiator. A thor
ough flushing Of the system should be
sufficient to put it in good order, and,
if it is not, the car should be intrusted
to repair man. A heavy coating Of
carbon on the cylinders will cause
knock, and the remedy is to remove
the carbon. Defective ignition, If it
causes a knock, should also cause
miss. Worn insulation, loose connec-
tons, poor adjustment of the vibrators,
incorrect spark gap, dirty plugs and
cracked porcelains are the principal
ways in which the ignition may give
trouble.
Which gives moro power-a long or
short stroke motor?
Within the limits found in ordinary
practice the short and long stroke mo-
tor will develop the same power, pro-
vided the piston displacement and
speed are respectively equal. Let us
consider two four-cylinder motors with
three hundred-inch piston displace-
ment. The long stroke motor has a
small bore, and the explosion pressure
acts on piston of small area, but this
is offset by the fact that the pressure
acts throughout the long stroke In
the short stroke motor the explosion
pressure acts on piston of large area,
and this compensates for the fact that
the stroke is short. The advantage OF
the long stroke motor lies in the fact
that for a given piston displacement 1t
has smaller bore than the short
stroke motor, the pistOns are smaller
and lighter, and the motor may be run
at q higher speed. because light piS
tons and connecting rods do not vi
! brate as much as heavy ones. and it is
by increasing the motor speed that the
small bore, long stroke motor is made
to give more power than the large
bore. short stroke motor of the same
size.
Is it common practice to reerind the
| cylinders when a motor is worn, or 10 it
better to get new pstons and rings?
| All depends upon the condition of
these parts. Sometimes it is advisable
to regrind the cylinders. which is the
case when they are worn oval. In this
case the fitting Of new pistons is diff
! ficult Job. and the previous troubles
would return again. If the cylinders
retain their circularity then new us
tons and rings may be fitted.
| Proving the Adage