U7 490 or 420?
The 490's DO NOT like 18" props. Watch the temps on your ESC's. I had 3 of the 80A Pro ESC's melt the shrink wrap off and I was hovering at 48% - 51% on 18's. Switched to 16" props and went to 62% hover and they are much cooler... (still hot though, T-Motor told me "It's OK, just...