There are countless RC Kill Switch devices available on the market. They are mostly simple and cheap devices, activated by signal loss or inactivity on RC channel which they are wired to. However, ...
I started with a Walkera HM M120D01 6 Channel RTF RC Helicopter w/ 2.4GHz WK-2603 Transmitter, with unfortunately disastrous results. This plane is pretty delicate, and prone to mechanical problems, ...