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for single cylinder,
1 C! a) ?5 s3 j; n- X) G" x4 e1. Weigh the rotating parts (bottom of connecting rod, lower connecting rod bearing, counterweight pin)- o3 o4 e9 a* C# M* h
2. Weight the reciprocating parts (piston, rings, wrist pin, top of connecting rod, top connecting rod bearing): a8 f' u+ P& e# G
3. Use 100% of the weight from #1 and 50% of the weight from #2.3 u! ^- o% |: z( A' f! l
4. multiply result of #3 by 50% of the stroke length to get the torque needed for the counterweight
$ U, P, y+ H1 H; X; K" ` |
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