This can be done roughly with hammer and chisel and then smoothed
up on an emery wheel, after which cut 24 radial slots 3/4 in. deep
on its circumference by means of a hacksaw. On each side of the
wheel at the center fasten a rectangular piece of 1/4-in. iron 3
by 4 in. and secure it to the wheel by means of four rivets; after
which drill a 5/8 in. hole through the exact center of the wheel.
Cut 24 pieces of 1/32-in. iron, 1-1/2 by 2-1/2 in. These are the
paddles. Shape them by placing one end over a section of 1-in.
pipe, and hammer bowl shaped with the peen of a hammer, as shown
in Fig. 4. Then cut them into the shape shown in Fig. 3 and bend
the tapered end in along the lines JJ, after which place them in
the slots of the wheel and bend the sides over to clamp the wheel.
Drill 1/8-in. holes through the wheel and sides of the paddles and
rivet paddles in place. Next secure a 5/8-in. steel shaft 12 in.
long to the wheel about 8 in. from one end by means of a key. This
is done by cutting a groove in the shaft and a corresponding
groove in the wheel and fitting in a piece of metal in order to
secure the wheel from turning independently of the shaft.
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