Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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

    BvU

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    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

    Nidum

    User Avatar
    Science Advisor
    Gold Member

    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 .
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Moment of Inertia of a Propeller?
  1. Moments of Inertia? (Replies: 4)

  2. Moment of Inertia (Replies: 1)

  3. Moment of inertia (Replies: 2)

  4. Moment of Inertia (Replies: 7)

  5. Moment of Inertia (Replies: 3)

Loading...