The Manchester journal. [volume] (Manchester, Vt.) 1861-current, 1916-08-31

sufficient air 10 forco5 throu0hg
The arrangement which you mention
should be successful provided suih-
Client air could be forced through the
cooling system However, II would bc
impossible to force air through rapid
ly enough to keep the exterior Of the
cylinder walls cool, as the metal with.
In the jackets Is not Of such shape as
to transmit the heat from the metal
to the air rapidly enough, nor would
the Jackets he able 10 carry sufficient
volume of air.
Ny four cylinder car knocks asd
pounds on a pull with retarded spark.
II misfires when the current indicator
begins to fluetuate. A now coil and
platinum points have been installed,
10 il possible that the relay is not
rieht7 The battery stands up well.
Could il be a spark knock, and, II So
what is the cause7 Would raising the
block one eighth Of an inch benefit 1t
or would il lower its power2
This is probably spark knock. You
must have the spark retarded too far.
Try advancing 1t little more on such
pull. There may be a great deal OF
carbon In the engine. II would be well
TO examine the spark plugs to see that
they are not sooted.
Raising the cylinder block would
give you more space In the combustion
chamber, thus reducing the compress
sion and consequently the power out
put,
would like to know something
about the properties Of gasoline as a
lubricant. Would a large size bearing
which 10 constantly bathed in gasoline,
revolving at a speed not over sixty or
seventy revolutions per minute, with a
light load, be likely to heat up IL no
lubricant other than gasoline were
used?
High grade gasoline has no lubricat.
ing qualities. In other words, it has
no viscosity The function Of lubri-
cant Is to separate metal surfaces
and prevent friction, which produces
heat. High grade gasoline IS very vol
atile and evaporates readily, leaving
no residue. The lower grades contain
more or less crude oil, and possibly
you have IN mind the use of the lower
grades.
What size Of wire is used on the ar.
axnr - and hnxA
mych wire 10 used2 Also, what is the
voltage OF a magnetic and the amper-
age7
Some authorities advise the use Of
,ne-half to quarters pound Of No
70 double cotton covered wire. OF
curse the amount and size differ. As
In indication Of the width OF varia.
ion 1t may be said that In the line
made by one magnetic manufacturer,
which includes 900 or more. not more
han half dozen have the same wind
ngs. This is matter upon which the
magnetic maker very reluctantly gives
Voltage varies from 5000 to 3OO0J.
nd there is a great difference in am
erage also, the low tension having
'reater amperage than the high ten
ion.
Which will run tho fastest, . four,
TX, eight or twelve cylinder car, size I
{ wheels, gear ratio, cylinder dispiacs-
nsnt and everything being equsl7 ,
That depends entirely upon the de
Ign and mechanical excellence OF the
ar. Two motors OF exactly the same !
ype and size might have very differ |
Mt performance for the reason that {
ne was better designed than the 9th.
r. So there is no basis OF comparison. I
Are aluminium pistons q SUGGEST
What changes would have TO make I
ther than changing pistons7 How
bout the connecting rods, etc.7 I,
Aluminium pistons have been adopted ,
Y many of the leading automobile
akers after long test The aluminium
stons can be used satisfactorily with
he regular rods In the engine, II that
Wnat you mean. .
Kindly explain why valves are re. :,
round by alternating rotary motion, .
view Of the fact that valve tappets !
.e arranged to give the valves a ]
lightly continuous rotary motion In o
,rvice. Also what are the objections
the continuous rotary motion in re.
'indine7 v
Valves are ground by an alternating II
tary motion 10 avoid scoring the
ats or the valves themselves. You T.
low that II you were sandpapering "A II
lely finished piece Of wood, such as b
! automobile body, preparatory to C
Uniting It you would not draw the b
ndpaper around IN a continuous u
.th, for that would leave ridges or 4
ratches. The same applies to grind. Il
z valves. N
viii you please explain the correct
sthod OF rcfinishine tenders and hood Of
a high grade carr
4 the hood and Tenders are smooth IA
d are simply dull from weather no ga
elimlnary sandpapering or smooth. Of
: will be needed, but you can best re
igc that yourself. With the sur o.
,es as smooth as required, the first d,
~ iC IN q ufllV coat ~ metal rtrfrner -,