I have been using a Gaui 330x as well as a test bench built to the same dimensions in order to gather some data about UAV energy use. I have been trying to figure out why we are having trouble getting the quad to hover in one place. It seems to generally move to one side or another. Using the trim settings we can get it as stable as possible but still unable to achieve a consistent hover.
I have noticed that we generally have a difference in our rpm readings of adjacent propellers. Two of our opposing props rotate at approx 20-40% less than the other pair. However, each opposing pair seem to be generally even. Might this be an issue or is there somewhere else we should look?
We were considering that it may be a gyro or ESC issue.
Thanks in advance for your responses!