Crf

Discussion in 'Education' started by kaungsat, Jan 30, 2014.

  1. kaungsat
    Joined: Jan 2014
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    kaungsat New Member

    how can i calculate coefficient of rolling resistance between the air bag and sand?
    :?:
     
    kaungsat, Jan 30, 2014
    #1
  2. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    Is this an inflated roller to move a heavy object?
     
    gonzo, Jan 30, 2014
    #2
  3. kaungsat
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    kaungsat New Member

    we use air bag to launch the ship
     
    kaungsat, Jan 31, 2014
    #3
  4. Ad Hoc
    Joined: Oct 2008
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    Ad Hoc Naval Architect

    Blow the bag up. Place a known weight on it. Place the bag onto the sand...then pull low down with a calibrated balance so when the bag starts to move, you have the load required to initiate movement = coeff. of friction. Since the load to pull is = W x coeff of friction. You'll have the Force/load (from the balance), then with the known weight (W) you can calculate the coeff of friction. As a good rough estimate, that's the best/quickest way.
     
    Last edited: Jan 31, 2014
    Ad Hoc, Jan 31, 2014
    #4

  6. kaungsat
    Joined: Jan 2014
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    kaungsat New Member

    thank you so much for your advice.
     
    kaungsat, Jan 31, 2014
    #5
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