Moment of Inertia – (The not too technical version) Click here for print version
       
 

acceptable tolerance what the MOI may be by measuring several heads and applying a best-fit formula to results based upon the dimensions. Remember, if we want to measure it precisely, then you will need a measurement devise that runs several thousand dollars.

Here is a formula for MOI in the face plane that one could use on basic shaped drivers, fairways, and hybrids made of a single material and did not have internal weighting within the head. It is important to measure the clubhead the same way we do.

  
 
  To give you an example, let’s use the Synchron Medic and the Acer XP905 drivers. Both of these heads are 460cc, but their shapes are slightly different with the Acer XP905 being more "pear-shaped", while the Synchron Medic is more full-bodied. We also used an intentionally light, unfinished Synchron Medic head to demonstrate effects on MOI.
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