The Fulton County news. [volume] (McConnellsburg, Pa.) 1899-current, 1903-05-07
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Il|p IA NH saying of successful bust
HYs---=IIl!!! 59sN IIl!!! ness men when asked as
2@9l to how they succeeded in
life. writes George Il. Chadsey. The
expression is peculiarly appropriate in
connection with the subject in hand
and particularly applicable, as regard,
the first part of the quotation. When
the first is carried out the last half fol-
lows as natural consequence.
The effect of tires on roadway /,
unmistakable in its results. The vida
tire has long received the vote of an
proval as preserver of roads. whprea,
the narrow tire Is universally conceded
to be destructive. Experiments con.
Quoted at the Missouri and South Caro-
lima agricultural colleges have demon
strated conclusively the advantages Of
the wide tire over the narrow one. both
in the beneficial effect on the road sur
face and the lighter draught.
AS regards the lighter draught tn.
tests made show that on macadam or
dirt roads the broad tires. under the
same conditions. carry a gain in lighter
draught of from sixteen to thirty-fve
per cent. over the narrow tire. Whers
the roads are soft and muddy but have
hard foundation the narrow tire
seems to offer less resistance than the
wider one. 1t cuts through to the solid
earth more easily and lifts less mud
But the season of soft roads is compar
atively short during any year and the
little temporary advantage passes out
Of consideration.
"A bad road will never become good
by the traffic of good vehicles passing
over 1t, but good road may become
bad by indiscriminate use of !mprope
wheels. Narrow tires grind and wear
away surfaces instead of packing and
cementing them. 1t has been demon
strated by NORM the French engineer
that a tire "a inches wide caused near
ly double the wear of 4.G inch tire
Further tests showed that 4G inch /
tire causes no more damage to road
than seven inch tire and the genera +
opinion Is that above 4.5 inches there
Is no special advantage.
1t may not be out of place at this
point to mention the influence 0.
wheels Of different dlameters on The
roadway. According to experiments
made at the Royal Agricultural SHOW,
at Bedford. England. the resistance Of
wheels increases inversely as the diam.
eter; that is, reduce the diameter Of
.he wheel by one-half and the force re
luired to move the load will have 70
be doubled. The cause of this differ
snce is attributed to the sinking down
Of the wheel in the roadbed. This sink
ing of the wheel is what destroys
road and an additional foot in dametg
of wheel might prove Of greater benefi
than an extra inch in width of tire. h
will be perceived that wheel of sinai
diameter has to cut deeper in order 10
get q greater bearing surface. On
well constructed road the elasticity d
the roadbed is equal to the down bear
ing and as the wheel passes over th
surface it quickly springs back to place
On poorly built roads the wheels crus
and displace the road materials. theN
by threatening the endurance Of th
roadbed and increasing the cost d
pulling a given load over it. In such
rase, even if the road be perfectly lev
Fl, the wheels are constantly going ova
nm incline. TO reduce this grade to l
minimum should be the object of tb
engineer and can only be accomplish
by making the roadbed so firm that
elasticity responds in measure 10 th
pressure of the wheels.
1t win therefore be seen hat seven
influences may be brought to bear upo
the maintenance of system of road
Proper construction of roads and car
full selection of vehicles that pass oy
them are two of the most importaH
factors in the good roads question. II
engineer may be responsible for d
first condition. but the latter COM
within the jurisdiction of the munlclr
u governing uthorities.-GOod Roai
Magazine.