Mark

Many thanks for that. What you describe is very much what happened to me although I was having trim issues intially (and I wasn't quick enough to save it like you!). I am only running the AR7200 with one satellite RX so I will put that in a park flyer and give it a good thrashing. I will be replacing the RX with a JR RX with mulitple satellites and chucking the power board. I just really hope it is not an intermittant TX issue as that it is just so hard to replicate that.

Also whether it matters or not but when it rolled it the RX and satellite woudl have been in the worst position as it was 200 meters downwind and level and the signal would be having to go past the turbine etc.

I just would have thought for me (and you) that fail safe would have kept it level had it been a lockout

John