The Brookings register. [volume] (Brookings, Brookings County, S.D.) 1903-1971, 1916-10-12
What are the advantages of valve i
head motors oyer others?

head motors over others?
The loss Of heat through the cylinder
walls depends to n large extent upon
the wall surface area, and by placing
the valves in the head this surface Is
reduced because there are no pockets
and hence there Is u reduction Of loss
The gases may enter and leave the
combustion chamber Of an average ]
type cylinder faster than they can the
chamber which has pockets, and hence
there IS n gain In power, The entire
combustion chamber Of an | head cyl.
inder may be machined, and thus
greater accuracy Is obtained as regards
compression volumes Of the different
cylinders. The combustion chamber
may be made OF a shape nearly spher-
zeal, and, since the spherical Is said to
be the ideal chamber, the / head is
advantageous from this viewpoint.
Can you tell me what causes q dis
agreeable odor TO come from the ex-
hsust?
The Odor from the exhaust is dis
agreeable at all times, but is worse
when the mixture Is too rich or when
too much oil is being used, thus caus-
ing smoking. The mixture can be
thinned by turning the needle valve to
the right or downward.
OF late whom advance the throttle
with a pull on the engine my car gives
a jump as though the clutch slips and
takes hold at once. What is the trou-
ble7
Your supposition hat the action Of
your car is due to clutch slippage is cor
rect TO a certain degree. The clutch
does not slip u OF engagement, the
trouble being that its surface has be-
come worn so that the FRACTIONAL re-
~sistance Is not sufficient TO hold the
load. II your clutch is a leather faced
cone type the leather has probably be-
come dry, assuming u hard glaze from
constant slipping which prevents 1t
from taking hold as 1t should. IL this
trouble has only started to develop
you may save the leather by soaking
II with neatSfoot or castor oil. which
will soften it and enable it to engage
easily and firmly. If, however, the
slipping has been going on for consid-
cradle time and the leather Is badly
worn the only thing to do is to replace
this facing.
Often with cone clutches the copper
heads Of the rivets project through the
leather, bearing against the iron fly
wheel and causing a. slipping action.
If your clutch Is a cone you should see
that the rivets are properly counter
sunk into the leather surface Of the
facing to prevent this.
II your clutch Is a disk type running
In oil the slipping may be due to grease
between the plates. The plates should
be cleaned with kerosene, usually pour
ed through the cover plate while the
motor is run for a time with the gears
In neutral. This will wash the grease
out, the kerosene then being drained
Off and the lubricant renewed.
Where the disk clutch is housed with
the gear box heavy grease should not
be placed In the gears, as this will
work its way between the plates of the
clutch, causing slipping.
Is there any way Of determining what
gear ratio IN final drive would prove
most satisfactory
The gear ratio Is determined after
the motor characteristics are ascer-
tanned. Suppose, for example. that the
maximum power of the motor is de-
veloped at 1900 revolutions per min
ute and 1t Is desired to give the car a
maximum speed Of fifty miles per hour.
A reduction is used which will cause
the car TO show fifty miles per hour
when the motor Is turning owe at
l,5O0 revolutions per minute. The
most satisfactory ratio depends upon
your motor md how YOU wish the car
to perform.
Can you tell me the best way to clean
the muffler on my car, which is becom-
ing filled with exhaust products Of the
motor?
The best way to clean the muller Is
to disaSsemble 1t and clean the parts
separately. II this Is not done the re-
suit will not be satisfactory.
10 il possible to remove carbon from
cylinders by using alcohol one part tn
four Of gasoline?
Alcohol may be used as a carbon re
mover, but not In solution with gaso
line. In the alcohol treatment the
liquid is poured into the cylinders
whose pistons are on top dead center.
The cylinder must be very hot. The
whole cylinder Is filled with the alec.
hol and the liquid allowed to remain
In overnight The next night two more
cylinders are treated. 1t Is cheaper
and better to have the carbon removed
by the oxygen treatment, which costs
from IS to 10 cents per cylinder and
takes only Z few hours.
Five Of my six spark pluss are crack
Cd. The car has been driven about
800 miles and the oil kept at proper
level. What 10 the cause Of cracked
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