This is a hinged antenna holder for the Frsky X8R: http://www.bcmultirotors.com/#!/Taranis-X8R-8-16CH-Telemetry-Receiver/p/35032157/category=13277089 I made it to go on the BC Chipmunk 170 frame: http://www.bcmultirotors.com/#!/BC-Chipmunk-170-Frame-Carbon-Fiber/p/52279767/category=9329089 Why? Because I wanted to be able to be able to fold it flat to fit in my case. It's also less likely to break it a crash. There is also a version with no holes to go on other quadcopters.