SJN,

I have 4 separate servos on my 'Roo operating independently as elevons. I simply used two receivers with separate switches and separate batteries. I connected the two outboard ones to one receiver, and the two inboard ones to the other receiver.

The place you are most likely to have a problem that would otherwise be survivable, is in a battery or switch failure. With my setup, a battery or switch failure would at least leave you with two control surfaces on either side of the aircraft that would function correctly in both pitch and roll - although at decreased rates. There is of course additional cost there, about $200 with the receiver, switch and battery accounted for, but its cheap insurance for a $5000 model, in my opinion. It does not help you in the case of strong interference that overpowers your transmitted signal, but I can't really think of anything that really helps you there!

I do think though that a club (especially one that is full of non-jet flyers) dictating what you are allowed to fly is total BS though. MOST 'Roos (and most other jets) fly with one receiver and do just fine. I did the above modifications for my OWN benefit, to protect my plane, not for any perceived safety issues for spectators. Remember, the most recent fatality in the US was caused by a small, slow prop. plane, not a jet...

Bob