I can tell you that in my experience I was very disappointed on how it flew, you either had full power to both engines or full in one and 50% in the other to turn with. There was no actual throttle control to fly level with unless you where taping the stick which gets very irritating. But to answer your question if you where smart you could tell when the plane wasnt climbing as quickly as normal which was your que to bring it down. The one i had was by flyzone (forgot the name but it had a 34" wingspan & was red) dont waste your $ on it it was very poor quality and i promptly returned it.