Aberdeen herald. [volume] (Aberdeen, Chehalis County, W.T.) 1886-1917, 1917-03-02

Which Of tho following methods will
step q motorcar in the shorter die.
tanee-applyins brakes TO lock the
wheels or applying greatest possible
brake strain without locking wheels?
And will . heavy car stop In a. short .
distance % q light ono, the speed and
brake power being equal?
1t is generally supposed that motor
car will stop in shorter distance if
the wheels are not fully locked. but
almost so and revolving. When the
brakes are applied so the wheels lock
the only friction tending to bring the
car to rest Is that Of the tires on the
ground, but when the brakes are ap-
piled SO as to nearly lock the wheels
there is rolling friction Of the wheels.
gear set and rear axle friction and
brake friction; hence with the greater
friction the car will stop in a shorter
distance. If you will watch street car
motormen whose cars are equipped
with air brakes or locomotive engi-
neers at work you will find that when
tho conveyance Is to be stopped the
brake control IL alternately applied and
released, thus setting and releasing
tho brakes, which prevents the wheels
from sliding. This not only tends to
keep the vehicle from moving off the
track, but stops It in a shorter dis.
lance than If the wheels had to Glide
On the tracks.
OF two cars exactly the same in ev-
cry respect, except as to the load car
ried, the one with the lighter load will
stop In the shorter distance. This may
be attributed to the fact that the in
ertia Of the heavier vehicle is greater
than that Of the lighter. If you were
pushing a baby carriage at ten miles
per hour you could very easily stop it
within q few yards, but If you were
pushing a 800 pound cart you would
nnd 1t would require greater distance
In which to stop.
Ny car consumes too much oil. Could
this b prevented by putting patent
rlnes on top Of tho piston and drilling
. enc. eighth or one.fourth inch hole
through the piston walls? Would
graphite help this any? There 10 an
oil feed from the precision oiIer lead.
Ing directly into the lower part Of the
cylinder.
The use Of patent rings will help to
prevent oil from reaching the combus.
ton chamber, but we suggest that be-
fore you install such rings you deter
mine the cause of the trouble. Per-
haps the cylinders are worn excessive
~ or the pistons worn too much, under
which condition 1t would be better to
use larger pistons. Perhaps too much
oil is being fed to the cylinders. The
drilling Of holes in the piston skirt also
will help. Graphite is good lubri-
cant for the cylinders and tends to fill
In the microscopic holes in the metal,
but It would not entirely eliminate
your trouble. There should be little
fear Of clogging provided you use the
correct amount Of graphite.
The Oldham coupling between my
clutch and gear box 10 very noisy.
Could you toll me Of way to sIim.
nate this7
Your coupling Is probably made in
three pieces. including the sleeve. ring
and square piece fitting over the for
ward end Of the clutch gear. There
are therefore two places where wear
can occur and cause noise in action
FIRST, at the Tugs Of the Oldham ring,
and, second, on the square sides of the
coupling. You should look at these
points and measure the clearance. II
the clearance is sufficiently great to
cause vibration and noise. new pieces
should be secured to at.
What would be the best way to
ienethen the drive shaft from the gear
box In Increasing the wheel base Of .
car by three feet?
If you intend to carry the rear axle
back q distance Of three feet the best
method Of lengthening the drive shaft
would be to cut it somewhere in its
length and drive a piece Of seamless
steel tubing over each end Of the shaft
q distance Of six inches or more. The
tubing can then be brazed OF welded
to the shaft and a good connection
made between the two. 1t must be
remembered that in frightening the
wheel base Of the car it throws the en-
tire steering layout out Of arrange
ment, and as q result Of this you will