This is by far not the best helicopter, but at least it is able to fly. I just uploaded it to tranfer it from my school ipad to my private ipad, but if you want to have it too, feel free to download. I don‘t know the exact controls anymore, but i‘m sure you will find out how to fly this bucket. The group 5 if for the additional turbo, since this was designed to be a long-range heli. You can toggle the thrust with the Trim. Other activation groups are for the winch, the magnet, the lights and for some weird gyroscope stuff. It is supposed to look like a helicopter from the german federal police (Bundespolizei), even though, it does not. Have fun with it, thanks for reading this till the end, your Julian