I had been disappointed with the vertical performance of my UCANDO with a thunder pro 46. However, last week I took off the 12 x 5 wood sport prop and put on a 12 x 4 APC. The aircraft will hover pretty good now. If it falls off the hover I can catch it with full throttle. It will also climb out of a hover. Not a power house but definately enough for a rookie like me to enjoy it.