The Brookings register. [volume] (Brookings, Brookings County, S.D.) 1903-1971, 1915-08-12

words, for a given volume and a give
mixture Il great amount Of heat unit
| vii! be contained 10 the cooler char-
provided that both are completely "
=. pOrized. The reason fur this i tha
the heat expands the charge, theret.
permitting a smaller number q ul.t
Of dis barge 10 he contained In 2 ~
en- volume. The fact thar some u -
heat units which wor.3 ordinarily ID
lost ara returned g. aetna. -Sg ty Pre-
heating the cEa--e i q factor n Ut
situation and does reduce ,le differ
enCe between the TWO conditions. lut j
IS doubtful Z o. many heat units wont
be given W il this manner SIS wouI-
be lost by having e ~pr,lea-el charge
The practical side Z The question, how
ever. IS n which must be looked upon
With the gasoline that we are now &c;
ing it Is necessary 10 Use heated all
IL The best results are 70 lie attained
otherwise the fuel Will not he vapo-iz.
ed. especially during cold weather.
How many teeth are 7eedeo FOR 3 two
~ CllS 9EA% ~ 0'N~ q 'NGhi - TX d
The gears should be such that there
are twice Is many teeth on the large
gear as there are on the small gear,
IL order 20 get & two 10 IA ratio. For
q two and ouehalf 10 one there should
be TWO and oue-half times as many
teeth on the large gear as there are on
the small one. The ratio may be Oh
tanned With an infinite number OF com
binari0ns. The size Of the C~earcase
will determine the size Of the gears,
and then the shape and distance be-
tween teeth must be found 10 get the
number Of teeth needed
Is there any possible way ~ which |
can install . pressure feed cling sys-
tern or my car? Il has . splash system
az present.
II might De possible 70 install this
pressure feed. but II would not be ad-
visible. In the first place. a great
amount Of special engineering work
would be required and many new
parts, such az d hollow crankshaft
and the pump itself. This would en-
tail q great outlay Of money which
would not be jusCihabie, because, aft
er the system had been worked out
and installed on the motor, the under
taking would. III every sense Of the
word, he al experiment. Any trou-
bles you may have been having with
your oiling are probably not due TO the
original design. but 10 some local de-
feet which has come up and which can
probably be readily cured In a much
more stnple way than by altering the
entire system.
Should the clutch be thrown out on
rough roads?
The clutch should be thrown out
and the brake applied slightly when
deep ruts are encountered. and many
drivers make riding easier by period
ically throwing the clutch on rough
roads. II the motor will pull slowly
there is no reason, however. for throw
ing out the clutch.
What valve timing should one use on
q two cylinder opposed motor with a
bore OF four and a quarter and a stroke
of four and a hslf7
Since the valve timing which will
give ideal results for any given motor
is a variable quantity and depends
largely upon such details as manifold
design. the only thing which can be
done is TO give an approximate timing.
from which you can vary In n direc-
ton or the other until you attain the
best results. IL the cams are already
made and In the motor yOu can only
place them SO that the valve openings
will correspond with those given and
allow the closing to take care of itself.
A fairly average timing which should
give good results is as follows: Intake
valve opens ten degrees after upper
dead center and closes thirty-fve de-
grees past lower dead center. Exhaust
valve opens forty degrees before lower
center and closes five degrees past up
per center.
Does Il harm Q high tension magnetic
that 10, where a car 10 run by one
aIons-to shut off the spark going down
hill and brake with your gears? 10 this
the best thing to do on . steep hill
And could this harm the cylinders3
1t does not harm a high tension mag
neto to do this, as no mechanical strain
il put upon It. and naturally 1t does
not generate current when switched
on. The practice Of using the motor
as a brake will not harm the cylinders,
but 1t Is said to put considerable wear
on the gears, due to the reversed &C
tion Of the reduction-that is. II the car
should be geared four to n when the
motor is acting IS a brake the reduc.
ton acts In an opposite direction and
becomes one to four.
How : stop rafting Of scissors
type shock ahsorbers without Tighten
inc up the bolts until the car rides
hardf
TO stop rafting OF scissors typ,
shock absorbers without taking mp or
the bolts until the q u hard riding
insert two thin rubber disks cut from
A old tube. On each side Of each wood
- washer - f1znishsdL