PCM zero lost a/c. Spektrum 4 lost a/c. In all cases I had more than enough battery. The smallest was a 4.8v 1650 and the biggest a 6v 2700. Largest a/c was 60 sized with 5 digital MG servos. All batteries are less than 8 months old. Last crash was on takeoff with a fully charged (Multiplex charger) battery. So I know it was fully charged and it was the first flight of the day. Receiver was a 7100 and the transmitter was a DX7. The plane had about 50 flights with the Spektrum system. The last flight everything was working until just after takeoff roll when the aircraft went uncommanded and did a slow roll to the left and into the ground.

The following day a foamy with a fresh battery, Phoenix 25 controller, 6100, and the DX7 transmitter about 2 minutes into the flight did not respond to inputs and took a rolling dive into the ground.

In both cases, once everything was placed on the bench at the field everything worked perfectly.

All connections are of the Deans type, heat shrunk, or safety clipped with the SonicTronics connection keeper. Batteries remained connected to the reciever and had sufficient voltage for the anticipated flying.

I bought the Spektrum specifically to not lose a plane due to someone else turning on on my freq. But I have no lost a/c with PCM and four lost a/c with Spektrum. I am beginning to regret my radio change. Something is not right but I know not what.