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Thread: Center of Gravity/Wt & Balance

  1. #1
    Join Date
    Feb 2018
    Location
    Newnan
    Posts
    9

    Default Center of Gravity/Wt & Balance

    As you know, I recently just bought my first plane (a '52 Tri-Pacer PA-22-135). I am a student pilot and was asked by my instructor about the weight and balance. I looked and the CG is listed as 68.53. However, the chart only shows a CG 10-24.

    I am trying to figure out what the 68.53 refers to. I believe it is related to when the datum used was the front of the spinner. But, how do I convert that number to the chart range of 10-24?

    Also, do I just subtract "60" from the 68.53 (because that is what I found one diagram showed; 60" from the spinner to the front leading edge)?

    Then, when I do subtract the 60 from 68.53 and then calculate the CG using the standard ARMS for a datum of front leading edge, my instructor and I are nose heavy. Does that sound correct?

    Anyway, I appreciate all help. Thank you

    r

  2. #2
    Join Date
    Oct 2013
    Location
    Lebanon, Mo.
    Posts
    187

    Default

    I have read where someone said Piper used the front of the spinner but I think they used a point out in front of the airplane. The spinner is not an accurate point because they are different length.
    I hope someone comes on who can give you more info on the subject.

  3. #3
    Join Date
    May 2018
    Location
    Waco
    Posts
    3

    Default

    According to the TCDS the datum is the wing leading edge

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