[Fot] Rod question

Larry Young cartravel at pobox.com
Sun Oct 26 16:25:49 MDT 2008


I should have added that the part which is not on the scale should also 
be resting with the pin center on something that approximates a knife edge.

Larry Young wrote:
> 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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