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Thread: One of my Fuel Balls Sank

  1. #1
    C-185's Avatar
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    One of my Fuel Balls Sank

    I checked my fuel tank before a recent flight, full by the touch. Went flying and noticed my bright orange ball at the bottom of my sight gauge. I burned about half of a tank and the ball came up a little. Landed and after tying down the plane the ball was at the proper fuel level. Checked the next day and the ball had sunk again. Some history, I changed this ball less than two years ago when I had the sight gauge apart for cleaning. Do they lose there buoyancy? I have flown cubs for a long time and have never seen it......... Maybe I got some bad balls?
    My superior skills continue to get me out of where my piss poor judgement took me......

  2. #2
    mvivion's Avatar
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    Quote Originally Posted by C-185 View Post
    I checked my fuel tank before a recent flight, full by the touch. Went flying and noticed my bright orange ball at the bottom of my sight gauge. I burned about half of a tank and the ball came up a little. Landed and after tying down the plane the ball was at the proper fuel level. Checked the next day and the ball had sunk again. Some history, I changed this ball less than two years ago when I had the sight gauge apart for cleaning. Do they lose there buoyancy? I have flown cubs for a long time and have never seen it......... Maybe I got some bad balls?
    Hmmmm, “bad balls”…….that’s likely to take the conversation in interesting realms.

    MTV
    Likes stid2677, alaskadrifter liked this post

  3. #3
    Richgj3's Avatar
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    Happened a lot on the early Legend Cubs. As I recall they would stick. I think we got new gauges. The first service instruction just said to remove the balls and put some white paper behind the sight tube so the fuel could be seen.

    It was a while ago. My memory may be sketchy.

    Rich

  4. #4

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    As long as they aren't blue . . .
    Likes Delta Cub, RaisedByWolves liked this post

  5. #5

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    Both mine sank within two years .Just usual crap available today.As we are experimental I am going for transparent tubes.Eliminate another possible incident.Will use fuel resistant tubing, being aware the transparency may diminish over time.

  6. #6
    nightflyer's Avatar
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    I think one is supposed to be lower than the other.

  7. #7
    Steve Pierce's Avatar
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    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  8. #8
    ADK_Cub's Avatar
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    One of my cork balls sank, figure that.


    Sent from my iPhone using SuperCub.Org

  9. #9

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    Hi Nightflyer,can you elaborate please.


    Quote Originally Posted by nightflyer View Post
    I think one is supposed to be lower than the other.

  10. #10
    wireweinie's Avatar
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    Quote Originally Posted by ron View Post
    Hi Nightflyer,can you elaborate please.
    It's the theory of impenetrability: No two objects can occupy the same space at the same time.

    Web
    Life's tough . . . wear a cup.

  11. #11
    nightflyer's Avatar
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    Quote Originally Posted by ron View Post
    Hi Nightflyer,can you elaborate please.
    I think Kevin Johnson can explain it best.

  12. #12

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    Quote Originally Posted by nightflyer View Post
    I think Kevin Johnson can explain it best.
    Like most, I’d have got a lot farther in life if my balls would have never dropped.

  13. #13
    Bayou Navigator's Avatar
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    Nah.
    Last edited by Bayou Navigator; 05-29-2022 at 08:01 PM.
    When everything is going wrong, and the world is bearing down on you.......GO FULL THROTTLE!!!

  14. #14

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    A couple years ago I refurbished my sight gauges with new gaskets and Univair plastic orange balls. I had read all the horror stories from this sight about gaskets/breaking glass/bad balls etc. Well, within six months my right hand side orange ball started "submarining" like described by the OP. Most of the time that stupid ball is at the bottom, but I do see it at the top or somewhere in between sometimes. Frustrating to go through fixing up all nice and then to not work shortly afterward. The good news is no leaks or broken glass and I can clearly see the fuel level so I don't plan on installing a new ball anytime soon. From my experience and other cub pilots I know, yea this seams to be an regular issue with these cub gauges.
    Thanks ron thanked for this post

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