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Thread: 180 tailwheel

  1. #41
    hottshot's Avatar
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    SB-

    I have written many responces to this post but here is the best one


    Have a Nice day.

  2. #42

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    I just want to say ”Thanks! 👍” to Stewart for this still-relevant data collection. Nice work!
    J

    Quote Originally Posted by StewartB View Post
    With the help of a professional airplane weight and balance mechanic and 20 sand bags, I did my test to see what the actual tail weight is at gross weight in three-point attitude. I had previously overestimated the total weight, but he weight still exceeds that allowed by the Baby Buswheel.

    The test plane is a 1975 180J with a few tricks added. I had a weight and balance done a couple of years ago and as it sits with all these tricks it weighs 1876#. In level flight attitude the tail weight is 130#. In three point it's 200#. So, I experience a 53% increase in the three point with no other changes. My gross weight is 3190#. Today I had the plane on certified scales and loaded it with sand bags in a well-distributed load that took it to 3190# and was within legal CG. The tail weighed right at 600#. I could have played with the loading and changed it a bit up and down, but this is a representative weight while in a normal (legal) load distribution. Without question a 3500# 185 would have 700# plus in a similar test.

    For estimating purposes I can divide my plane's total gross weight into five parts. Each main carries approximately 2/5 of the weight while the tail carries 1/5. This is not perfect by any means, but it works on my plane.

    I wanted to know, so I paid my money and found out. No speculation, no smoke and mirrors, no BS. There it is.

    Stewart

  3. #43
    Dave Calkins's Avatar
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    Old thread.

    SB, who weighed your airplane at Birchwood?

  4. #44

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    Rod Miland. That was better than 10 years ago. My plane's lost 40+ pounds since then.

  5. #45
    Dave Calkins's Avatar
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    yep

    wondering if you did the formulating or he?

  6. #46

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    No formulating. The plane had been weighed fairly recently (at that time) and the three point numbers matched. My tailwheel weight was taken in 3 point. All I did was add more sandbags. Pretty straight forward.

  7. #47
    Dave Calkins's Avatar
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    who weighed and formulated for the previous numbers. you know where I am going here? errors?

  8. #48
    Dave Calkins's Avatar
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    not in the actual tailwheel weight. just in w&b paper

  9. #49

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    I know precisely. From experience. No errors in this one. Or the current one.
    Likes Dave Calkins liked this post

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