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Automotive How to calculate how much power required to turn a flywheel?

  1. Jun 9, 2016 #1
    How to calculate how much power required to turn a flywheel at constant velosity ? Suppose I have a flywheel of 24 inch diameter, width 5 inches,50kg and constant angular velosity is 1500 rpm. How do I calculate the required power (HP) to turn this or any other with different values?
     
  2. jcsd
  3. Jun 9, 2016 #2

    CWatters

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    If there are no losses (eg no friction or air resistance) then it takes no power to keep it running at a constant angular velocity.
     
  4. Jun 10, 2016 #3
    If there are no losses you can use the formula


    Energy= 1/2 * I * W2

    I= m*r2 * constant depending on shape

    then divide by the time you want it to reach the angular speed you want (e.g in 10 sec ...)
     
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