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I Moment of Inertia of a Propeller?

  1. Mar 5, 2017 #1
    Is there an equation for the moment of inertia of a propeller? If so, what is it? If there isn't one, can I use the moment of inertia of a rectangular slab? Thank you in advance.
  2. jcsd
  3. Mar 5, 2017 #2


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    Hello dd, :welcome:

    That's one approach. Another is to stay closer to the definition of moment of inertia and calculate ##\displaystyle \int r^2\;dm## (if you have enough shape information).
  4. Mar 5, 2017 #3


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    There is no general formula .

    Quite easy to do though - just divide any one propeller blade into thin sections and sum up the individual moments of inertia numerically .

    Then multiply by number of blades and add moment of inertia of hub .

    Hub is just a solid of revolution so no problem doing that bit either analytically or numerically .
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