I use to fly my ucando at full throttle all the time. I did have only a 4 pitch prop though. (13x4). Never in a dive. but, yes that was probably pushing it. There is a guy at the field with the bigger reactor and his flys very well. I guessing, but I don't think the reactor will be as stable as the ucando.(really thin wing vs. really really really thick wing). The reactor should be good for 3D if you keep the weight down.