I lost an E-Flight 70mm F16 Thunderbird due to lost of signal/control - twice. The first time I though it must have been a problem with the battery or the ESC, but could never reproduce the complete and sudden loss of power and control. Rebuilt the plane flew it several times. Just today, had the plane drop power and control again, just as I was making my final turn. Lost it in the trees. Two other people at the field lost planes with this exact receiver. Same thing, sudden loss of power and control.