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ball bearings. These, support "the
framework, the motor and the
rider, and keep them level with
the ground. There is no traction.
The propellers, 41 inches wide,
having a forward thrust of 50
blow'the hoop along just as a boy
with a stick knocks his hoop
along the walk. The hoop is
merely 'an endless, always revolv
ing track upon which the rider
There is a minimum of friction
and air resistance to be overcome,
"and no power is lost in transmis
sion. Inside the hoop is a saddle for
the rider, the motor and handles,
with which are connected two
wires leading to the steering rud
der. Coates and his co-inventor, W.
McDonald, explained the work
ings of the aero-unicycle to me,
and invited me out to the Catlin
field to "see, it roll." At "five in
the morning, before the curious
were awake, William Hunter, a
professional motorcycler, rolled
the unicycle out.
Hunter leaped on the saddle,
started the motor (six horsepow
er) and Coates "cranked" the ma
chine by turning the propeller.
" The hoop began to revolve, the
" rider and the machinery gliding
along on the inner rim.
With three revolutions Hunter
leaned "forward on his saddle,
x thereby drawing up the two small
Wheels about a foot from the
ground, Nand he was off. A 'me
chanical counter of revolutions of
the hoop told us he was rolling
55 miles an hour. He had "the
queer vehicle 'under perfect con
trol, turning and stopping at will.
"The hoop will cover a mile in
250 revolutions," said Coates,
"and an engine capable of driving
the hoop 3,000 revolutions a min
ute can be carried. That gives
the ijiachine a speed capacity of
12 miles a minute, or 720 miles an
hour, a velocity at which no per
son could probably live, even with
wind shields and .oxygen tanks
"There are these dangers:
Striking an obstruction, 'getting
one of the small ball-bearing
wheels out of its track. Either
one would mean a sure and sud
den death to the rider. They are
mere possibilities, though."
Coates is ablacksmith; Mc
Donald is a sidewalk contractor.
Both' are speed dreamers, and
now they have a machine that
looks good to make their dreams
. HOW THEY STAND.
Cobb, Detroit American ... .415
Zimmerman, Chicago, Nat. . .402
W. L. Pet.
Wood, Boston 19 4 .828
Marquard, N. Y.... 19 3 .864
Milan, Washington, Amer... 46
Bescher, Cincinnati, Nat 29
Boston, American . . . . ..280
New York, National 290
Pittsburgh, National 966
Boston, American 961