ORIGINAL: CGRetired
Bill, I believe that the problem was resolved back a couple of years ago. I'm not sure what they did, I seem to recall that they either lowered the threshold voltage or reduced the re-boot time... or maybe both. A properly charged 4.8 volt pack of sufficient capacity should be just fine.
I just happen to like the response of the 6 volt packs so I stick with them, but I could easily use 4.8 volt packs... I'd use at least 1000 mah, though, but only to get the flight time and not for any concern about a re-cycle time for the receiver.
CGr.
They have reduced the re-boot time but I don't know of any threshold lowering. Brownout isn't a real problem unless you are inverted, diving, flying level or taxi-ing. Can't really think of a good time to lose control of my plane unless maybe when it's in the trunk of my car.[:@] Futaba has a much lower threshold. Their servos get sluggish before losing lock.