Today I was flying with the xcub and it suddenly just started violently rocking, there were only 4KTS of wind and I was flying at 12000 feet going at around 105KTS. These violent rocks only happen for a couple seconds each, I had a couple more along that flight as well.
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Well, according to a quick Google search, the XCub’s ceiling is 11,500, so perhaps you may too high, especially considering it’s a light taildragger rather than a heavier, more powerful aircraft such as the TBM.
The wind monitor may not always be precise to the second. I wouldn’t worry about it too much, considering the XCub is a light aircraft, subject to the slightest of winds. If it happens to the point where your flight profile goes haywire or you crash, that’s when I would be really concerned.