To finish this description. The fulcrum point gives the center of
gravity. You then divide the total rod weight by the fraction distance
from crankpin (center) to center of gravity and wrist pin (center) to
center of gravity.
You can also do a direct measurement. Lay a thin rod (I use a finishing
nail) on your scale. Rest the small end on a block next to the scale
and the big end so that the nail is lined up with the center of the
crankpin. This way you know you are measuring the weight at the center
of the crankpin. Reverse the ends and measure the small end weight. If
you do it right, the two weights should add up to the total rod weight.
Both of these methods should give similar results.
Larry
Steven Preiss wrote:
> Probably does it by finding the balance fulcrum and measuring the distance
> from either end.
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