Uncontrolled pitch movements using FrSky FBUS Protocol.
I've been using the Brain2 with FrSky F.Port on my helicopter for some time. I never had any problems with that. With the new Ethos integration I switched to FBUS. Unfortunately I have uncontrolled pitch movements with FBUS. I use the TDMX receiver with tandem protocol. My clubmate has the same problems with FBUS. He uses the R4 ACCESS receiver. Both receivers work with the latest FrSky firmware. The Brain2 works with the latest Firmware too. If we go back to F.Port everything works fine again. For this reason we think this is an Brain2 FBUS issue.
Please, manually re-upload firmware 3.4.084 using the "Manual Firmware Upload ..." command from the File menu (top left) of the Windows app.
X20S HD Ethos 1.3.0 f bus TD MX 1.0.8 RF 2.2.2.
I had complete failure, receiver entered failsafe in flight at less than 100metres. Heli flew for a good 30 seconds enough time for it to do a big loop, but control never came back, recovery was held in during that 30 seconds!! failsafe was set to 'no pulses' on throttle and hold everything else, in hindsight this should off been set to recovery. I was unaware that F_BUS had problems with the brain and its cost me severely. I too have used F port without issues. Frsky is now dead to me which is sad because the transmitter and ethos is really nice, i was enjoying it, but not the reliability. the worst part being my transmitter being the HD and no updates are released for it, certainly not tested ones, so your in the dark, just a guinea pig really.
So i hope this saves someone else some heartache.
Horus X10s Opentx:2.3.14 ISRM v2.1.6
Trex 700X: Archer SR8 pro (v2.1.10) FBUS
SAB Kraken 580: Archer R6 (V2.1.10) FBUS
Same problem for me with my two helicopters, luckily I saw it before flying, I did some tests and there is a big problem with versions 3.4.084 and 3.4.086, after a random time the communication between the brain and the receiver cuts off and does not come back, when I put back version 3.4.059 I no longer have the problem.
Justin thanks for the confirmation and so pleased you never experienced your blades looking for potatoes, it's a nightmare that takes a long time to recover from.
Hopefully MSH will rectify their mistakes before any other victims have to come to light. Altho this horse has well and truly bolted.