Hi all,
I lost a brand new Ultra Lightning on the maiden flight this spring, due to this very issue IMO. Exact same setup, with 2 brand new A123's. Everything brand new. It just flew away, on a knife edge pass, until it snapped out and crashed. It was not signal loss/lockout. My failsafe was programmed to kill the engine, hold the flight controls, and extend the gear. The gear remained retracted at point of impact. The 18MZ tx I was using works flawlessly in all my other airplanes. I'm back to 6014 Rx's and straight powerbox cockpit in all my jets now. That was my first turbine aircraft radio crash in 14 yrs. Took the wind out of my sails for a while. Unsat.
Erik