6b. Measure and then mark a spot
on each 1"× 2" frame piece, 3¾" from
the back edge of the frame. Place
the combined water reservoir and air
cylinder assembly on the 1"× 2" frame
pieces at the marked spots. Now place
the ¾" copper pipe clamps over the
assembly. Screw the pipe clamps into
the 1"× 2" pieces. The clamps must
hold the combined assembly firmly
6c. Slide the screw eyes on the connecting rods onto the crankshaft, so
that 1 screw eye is on each of the 2
cranks. Place the soda-can pistons
inside each of the water reservoirs so
that each soda can rests on copper
pipes. Turn the crankshaft so that one
of the cranks is pointing downward.
Holding the crankshaft level, lift the
crankshaft until the can corresponding to the bottomed crank is about ½"
above the top of the copper pipe. This
is the desired height for the crankshaft. Mark this height on the upright
2"× 4" and attach the angle bracket at
this point, making sure that the hole
through which the crankshaft will
pass is located 3¾" from the back of
the 2"× 4".
6d. Slide 1 flywheel onto each end of
the crankshaft. Position the flywheels
so that they are as far inboard as
possible without interfering with
the cranks or piston rods. Glue the
flywheels onto the crankshaft using
super glue and accelerator spray.