I am looking for a radio transmitter and receiver for my APM 2.5 on my quadcopter. I am considering the Turnigy 9xr (8 channels) but am capable of spending a little more. Are the higher priced radios actually worth it? Also, there doesn't seem to be…

I have the APM 2.5 with the 3DR quadcopter. I don't have a radio control for it; only telemetry with my ground station. Everything seems to be working and when I turn up the throttle the motors spin faster but they all spin clockwise and it can't…

Hey so I hope I'm posting this in the right place. I was just given an arducopter and I really don't know much about it. I have the APM2.5. Is there anything on that chip already that is some sort of wireless communication system or do I need an…