Finally got mine flying this weekend. The plane I'm using is my own design of the Yak. It came out to 6.3oz with a 2 cell 730 pack. The 2 cell is a little under powered. I was able to stop it coming down, but not able to get it to back up at all. It's pretty cool coming straight down and the plane stopping. I am going to try a 3 cell pack next.