I agree with Pyolet entirely but in answer to Gordons request I did some more testing using JR synth Rxs and Tx modules. .

First test was again with both Txs on same frequency and similar programmes, results as posted earlier. There was NO intermediate failsafe position, either one Tx had control or the other had SOME control.

Then tried with Tx 2 on Z pcm. No intermediate failsafe position. Either the main tx had full control or the second, Z Pcm had, limited and very erratic control.

Then tried PPM. When second, ppm, tx got very close, Rx went into failsafe.

Conclusions: JR makes very good radio equipment , the impossible it can almost manage (I mangaged to safely land a model when someone arrived at our field in the UK and switched on his Tx on my frequency AND extended his aerial) but miracles (same frequency transmitters transmitting virtually identical PCM codes) is beyond it. JR can't bend the laws of physics however much we would like it to. 2.4 might be the creater of the miracle.

Since using the new JR synth Rxs and Txs I have not had a single failsafe recorded by my JetCat ECUS which are checked after EVERY flight and other models all have glitch recorders which have always shown a "clean" flight.

The JR manual actually states that failsafe works "in the event of loss of signal" not the reception of a slightly corrupted signal. There must be thousands of 10xs out there giving superb service, so stop worrying and get out flying BUT with positive Tx control, the system at NALL is critically flawed, in my view.

I repeat, David Shulman's Ultra was shot down, my tests confirm his, and Dave, I certainly regret your sad loss.

Regards,

David Gladwin.