Balancing a crankshaft.

Discussion in 'General Engine Discussion' started by rlukens, Oct 8, 2018.

Help Support HMEM by donating:

  1. Oct 8, 2018 #1

    rlukens

    rlukens

    rlukens

    Well-Known Member Project of the Month Winner HMEM Supporter

    Joined:
    Feb 23, 2010
    Messages:
    130
    Likes Received:
    52
    Gender:
    Male
    Occupation:
    Retired
    Location:
    SW Florida
    I'm wondering about balancing a single cylinder crankshaft. I've "designed" and built a few engines myself . I've always balanced the crank by itself, out of the engine, on roller bearings. I'm building my first flame eater and perhaps a little over-concerned after reading other's accounts of failure. Is there a better way to balance the crank? One that accounts for rod and piston momentum, combustion forces, etc. etc.
    Wondering.
    Russ
     
  2. Oct 9, 2018 #2

    tornitore45

    tornitore45

    tornitore45

    Well-Known Member HMEM Lifetime Supporter

    Joined:
    Jan 17, 2009
    Messages:
    525
    Likes Received:
    84
    I think the crankshaft optimum balance is when it balance the pin plus 1/2 of the attached reciprocating weight. So is difficult to do experimentally but can be calculated, with patience.
     
  3. Oct 9, 2018 #3

    WOB

    WOB

    WOB

    Well-Known Member

    Joined:
    Sep 12, 2013
    Messages:
    102
    Likes Received:
    25
  4. Oct 10, 2018 #4

    rlukens

    rlukens

    rlukens

    Well-Known Member Project of the Month Winner HMEM Supporter

    Joined:
    Feb 23, 2010
    Messages:
    130
    Likes Received:
    52
    Gender:
    Male
    Occupation:
    Retired
    Location:
    SW Florida

Share This Page