The Brookings register. [volume] (Brookings, Brookings County, S.D.) 1903-1971, 1915-05-13

can enc tell WHen tn6 proper anOuHt
has been addedf
Distilled water should be added be
fore the battery is placed on charge.
The solution should cover the plates.
In some batteries the level Is one-half
inch higher than the tops Of the plates.
A battery can be tested at any time,
and obviously the only way to tell
whether It IS fully charged or not IS
to test 1t In some manner, the gravity
method usually being used.
What part does gIyoerin play in an
anti-freeze solution?
Glycerin is used in anti-freeze solu-
tons for the reason that 1t prevents
the alcohol In such solutions from evap-
Grating rapidly and thus preserves the
power OF the mixture to resist the cold.
would like to have you tell me why
have trouble in starting my car when
warm. Several times have had to
get help from some ono who could
spin il. Spinning always starts IL, but
this am unable to do. IL always
starts readily IL thrown into high when
rolling down a grade.
The fact that you have nc trouble In
starting the motor when cold would In
dictate Immediately that the trouble Is
not in the ignition system. II you will
try q slightly richer mixture on the car
bureter 1t may relieve the trouble. An
other possible cause is that the valves
may be adjusted too close so that when
cold they close, but when warm there
Is an air leak that dilutes the mixture.
Carbon trouble also acts this way at
times, and IL the motor has not been
cleaned out lately 1t Is suggested that
the carbon be removed. Another posi-
Bile feature which does come under the
head of ignition is that the dry bat
teries may be weak.
In drilling holes In pistons to make
them lighter how much can be taken
off and how should they be drilIed7
You can safely drill eight three
eighths inch holes equally spaced
around the piston. In drilling place n
cylindrical block of wood In the pis-
ton. the wood Just fitting. This will
prevent the metal from cracking. You
can hold the piston under the drill
with your hands.
Would a good iron rivet be suitable
to rivet a front cross member to the
frame on a light car or should Il be
put on with steel rivets7
Good iron rivets would be suita BILE
to use on the frame Of a light car.
The principal stress endured by these
rivets Is n OF sheer through the tend
ency to rack ON the part OF the
frame. A great deal depends upon
the n In which the riyeting Ia
done. For instance, II has been shown
In experimenting that a r1vet Is 6.5 per
cent weaker In a drilled hole than in a
punched hole and that by rounding the
edge OF the rivet hole the apparent
steering resistance Is increased II per
cent 1t Is also true that steering re-
sistance is probably less for double
than for single sheer, and this is prob
ably due to the unequal distribution Of
the stress on the two rivet sections.
Experiments on the steering strength
OF iron and steel rivets would indicate
that the proportion Of iron to steel is
as 10 to 22.1. This ratio Is said to be
valid only II the sheer Is In a plane
perpendicular to the direction Of roll
Ing. which would be approximately
the case In your cross frame connec
tion.
What are the advantages and disad-
vantages Of the disk friction chain
drive compared with other types of
transmission now more commonly
used7
The advantages Of the friction trans.
mission are that 1t offers an infinite
number of ear ratios, is silent, cheap
to manufacture and simple. The dis
advantage Is that tie friction disk
must be renewed every few thousand
miles. This IL a small matter, but
worth noting. and the amount Of
horsepower 1t will transmit under the
conditions found In automobile dests,n
Il limited Therefore 1t has never
been used to any extent on large cars,
but has found favor on some cars Of
medium size and on more small cars.
The gear set Of my ear b Of the plan
stary type. When the low speed pedal
b pushsd down 20 start there 10 I
knock hoard from The esar ct AZ rsou-
lar intervals. What u che cause o. III
Owing to the speed Of the motor In
starting out on low speed the knock
ron speak Of possibly II at the outer
bearing or transmission shaft bearing.
where the car il cfanked- The dust
"a dirt continually working IN this
bobbtf< cut out the bearing sullcient-
~ o produce ! knock at this point.
1onrlng has Z babhttt lining and
yoored - at the shaft.
Iotn whs2hse thsss would
@G1o1o oolno6 ~ nttlNs