RE: strange crashes
humpy64
Do any of the failed aircraft have any one common part in the radio system that you swapped into each plane?
The DX7 is the best radio I've ever used but, I did have a similar situation. I lost a ParkZone Corsair three times in the same manor. I finally found a small hole in the LiPo battery. It was from a motor mount screw that had punctured the battery and the system would short out, losing the radio link.
You may have a bad wire in the battery, switch harness, or receiver. It only take a second of power loss to lose the link. It can be restored if you turn the transmitter off and back on, but who has time to do that?
I don't believe radio interference is an issue. The DX7 uses Dual Link, two seperate signals.