Counter balance?

Discussion in 'General Engine Discussion' started by robcas631, Oct 16, 2011.

Help Support HMEM by donating using the link above.
  1. Oct 16, 2011 #1

    robcas631

    robcas631

    robcas631

    Well-Known Member

    Joined:
    Sep 30, 2011
    Messages:
    525
    Likes Received:
    71
    I am wonder as to how one calculates the counter balance weight on the crank? Do you add the weight of the connecting rod + 1/2 Crank?
     
  2. Oct 18, 2011 #2

    Maryak

    Maryak

    Maryak

    Well-Known Member

    Joined:
    Sep 13, 2008
    Messages:
    5,001
    Likes Received:
    73
    Rough and ready........... the counter weights equal half the weight of the moving parts.

    Best Regards
    Bob
     
  3. Oct 18, 2011 #3

    MachineTom

    MachineTom

    MachineTom

    Senior Member

    Joined:
    Oct 20, 2010
    Messages:
    851
    Likes Received:
    114
    The answer depends on the configuration of the crank, and engine. Inline or V, what angle of Vee, plane of crank 1, 2, 3. On a single cylinder engine, counterweight = 100% of the rod +50% of the piston mass. There is really much math involved in setting the mass of the counter weigh, RPM is a large factor, rod lenght, on and on.
     
  4. Oct 19, 2011 #4

    robcas631

    robcas631

    robcas631

    Well-Known Member

    Joined:
    Sep 30, 2011
    Messages:
    525
    Likes Received:
    71
    Thank you!
     

Share This Page