The Brookings register. [volume] (Brookings, Brookings County, S.D.) 1903-1971, 1917-04-05

t@N 49,, '
automobile tire travels In the direction
opposite to that which the tire is fol
lowing Is entirely erroneous. The air
Is In a compressed state inside the
casing, and when the casing travels
the air within 1t tends to go In the
same direction.
we'll made and mounted in cars equally
well made, which would pick up speed
quicker from a standing start or when
running very slowly, a motor with a
bore and stroke about equal or a motor
with small bore and long stroke?
The stroke of the motor Is no meas
ure Of its ability to pick up. 1t can
be shown that a short stroke motor
will perform just rs well as If not bet
ter than a long stroke when pick up is
considered, and 1t also car be shown
that a certain type of long stroke
motor will outclass the short stroke
In this respect. There are more things
to consider than stroke.
What arc the advantages and disad-
vantages Of the semielliptic, elliptic and
thrse-quarter elliptic springs?
The advantages and disadvantages
Of the various types of springs de
pend upon weight distribution and the
design OF the car. One form Of semi
elliptic spring may be superior to a
certain form Of elliptic or three-quar-
ter elliptic. or vice versa.
Spring suspension has been IA great
problem to motorcar engineers, be
cause the car OF necessity must travel
over rough roads and ut slow and high
speeds. If the object of the springs is
understood clearly the relative advan-
tages and disadvantages Of the vari-
Gus forms will be understood more
readily. Springs must support certain
members Of the car: they must absorb
the shock transmitted by the road
wheels. Springs to be efficient must
prevent the body of the car from
swaying. In other words, the springs
Of a motorcar must be strong to sup
port a load and resilient to make rid
ing easy.
The semielliptic spring Is used In the
majority OF vehicles In the front and
In many also in the rear. This type
reduces side sway greatly and yet Is
not hindered In its movement. 1t is
adapted to carry great weight without
the tendency to permit side sway.
Stiff semielliptic springs are not to
be desired when shock absorbing quail
tiles are factors, for when a car with
such springs strikes an obstruction on
the road the tendency Is for the wheels
and axles and perhaps a portion Of the
car to leave the ground.
In the elliptic spring the tendency to
side sway is unusually great. This
type Of spring, If made to be as strong
as the semielliptic. will perhaps lose
much Of its resiliency. Average design
shows that the elliptic is far more re
silent than the senlielliptic and better
able to absorb shock. In the three
quarter elliptic type the problem is
more a manufacturing problem than
any. If this form is used the over
hang Is lessened, which calls for q
longer wheel base.
10 Il possible for a two cylinder, four
cycle engine to be perfectly baIanoed7
The moving parts Of a two cylinder
motor with horizontal cylinders are
very nearly balanced, but not perfect
ly. In the two cylinder vertical the
balance will not be as good, while in
the two cylinder V type with cylinders
set at ninety degrees the balance Is
better than in either Of the other types.
Will you kindly inform mo whether q
high tension magnetic that runs at
crank shaft spesd and rotates clock
wise can be timed or changed to rotate
opposite or anti ciockwise?
The magnetic referred to can be
changed to run anti-clockwise by sim
ply removing the gears from the dis
tributor and resetting them SO as to
larry the current over the points Of
contact throughout the full range Of
spark advance at full retard and at full
advance. Simply take the gears out of
the distributor. revolving the armature
by hand In IN a~nti-clockwise direction,
and when the position in which the
armature turns requires a good deal Of
force to continue the turning, due to
the pun Of the magnetic. insert the gear
In the distributor SO that 1t Is just com
Ing into the metal contact. If the model
magnetic referred to has a roller type
distributor the same operation holds
good, except that the roller with the
internal gear should be set so that the
contacts are just meeting the small
metal roller.
have had some trouble with clip.
ping out Of high while going down
grade and could probably remedy 4 n
! know what 60 look for. What would
you susesstf
It IL very likely that the lower end
Of the control lever has been lifted
too lightly against the shifting bars In
the gearset BY removing the control
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