The Oskaloosa herald., 1915-11-04

their weight
that V and horizontal types Of engines
had a tendency to wear the cylinder
oval and that excessive piston wear
would result, but this has been found
to be untrue. The piston weight can
be considered In this respect as negligi-
bic in comparison with the side thrust
OF the piston on the cylinder wall due
to connecting rod angularity.
What is the most efficient angle Of
the fan bIade7
There is no such thing as the most
efficient angle of a fan blade. Every
different speed of the car, every differ
ent variation of the velocity of the
wind, of the speed Of the motor and
diameter Of the fan itself, would make
the theoretical pitch undergo wide
changes AS stated by one authority,
it is impossible to give any general
rules or formulas covering the proper
tons of parts of fans and blowers.
There are no less than fourteen varia-
bles involved In the construction and
operation of a fan. slight change in
one producing wide variations in the
performance Therefore the design of
a new fan is largely a matter Of ex-
perimentation until a compromise de-
sign is finally reached.
10 il better in going down a hill to
let the clutch out and apply the brake,
or 10 il better to leave tho clutch in and
then apply the brake?
The best method is to leave the
clutch engaged, open the throttle and
shut of the ignition, in which case the
motor sucks mixture. Under such con-
ditions the wheel brakes are not re-
Quired to do so much work, and hence
the wear Is less than II the motor did
not contribute to the braking. If both
motor and brakes are used the car will
stop more quickly.
Whom the rivets which hold the
frame Of q car together become loose,
what is the correct way to put in new
ones, and Of what material should they
be made?
Use a chisel to remove the old rivets
and then insert new ones. The rivet
is placed in position, and while one
person holds block of hard wood or
metal against the rivet head another
uses the riveter at the other end. A
riveter may be made by simply hollow
ing out the end Of bar of steel, the
followed portion to be large enough al
most to fit the rivet head. The block
or back stop may be either metal or
wood, and it is used merely to keep
the rivet in place and allow of the
other end being forced into shape.
You will find the usual frame rivets
to be either five-sixteenths or three
eighths inch in diameter and these
may be riveted in place either hot or
cold. The rivet material is usually
soft tough steel or iron. and when pur-
chasing mention the work the rivet
will do.
How 10 play taken up in a steering
sesr7
On top of the steering gear case there
is a nut, and by screwing down on this
nut the play is taken up. If you have
difficulty in doing this work notify the
manufacturers. and they will advise
you further.
Would IL DO practicable to use an old
rnotorear engine to pump water for ir-
rigation purposes? " so, what speed
should the engine run and what would
be the horsepower of a 4La by inch
four cylinder motor7 We use centri-
fueal pumps. The water lift is twenty
FIVE feet. nv
1t would be practicable to use an old
four cylinder automobile engine for OPP
Grating n centrifugal pump for forcing
water some distance. The speed of the
motor will be dependent upon a mum.
Der of things, principally the distance
the water is TO be pumped, the size
of the pump. the ability Of the motor.
etc. You will have TO confer with
man familiar with irrigation details to
get specific data. The four cylinder
engine you have should show about
thirty three horsepower az about 1000
r. p. m. This would be ample for
a twenty-five foot head. as many In
stallations in use at present are using
motors of less power. Your motor may
be installed where four cylinder en-.
CINE Is coupled directly 10 a centrifu-
gal pump A separate stand may be
used for the fuel tank. or IL may be at
tached TO a bracket fastened to the en-
CINE stand. In stationary work such
as this kerosene has been found to
give almost as good results as gasoline.
and we suggest that you think serious
~ of the fuel problem. especially
should the station be in an isolated
district In the matter of cooling you
could erect small stand with tank
attached. The water exhaust may be
led to the main line and the intake at.
tached to pipe leading into the tank.
Operated at speed OF between 500
and 800 E. p. m. your motor should de-
yelop sufficient power to show good re-
suits with twenty-five foot head; but,
as stated previously. there are many
conditions entering into such an iry
stalDation which require the services ef
an irrigation expert
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