Guys,
I'm glad this came up. I just got back from the Triple Tree IMAC and lost a side on my airplane, and thanks to two recievers I still have it... it not only saved the airplane, I finished the meet and won it. I would rather spend a couple hundred extra to save thousands than sit through the rest of the year watching what I 'could've' done had I just put that extra rx. in there. I made a perfect landing on one side with no power and made my appraoch less than 5 feet over the lake at Triple Tree! If I hadn't had that other reciever, I would've been taking a swim to collect the pieces of what used to be my airplane. There is another solution to this...it is a powerbox, and it gives full redundancy without losing a side. I will be using one of these on my next airplane. I would never consider flying one of these expensive 35% and up airplanes without FULL redundancy. If you have one reciever with dual batteries, and switches you do not have FULL redundancy...you simply have a single failure point supported by twice the battery power...you are also doubling the load both of those batteries will be carrying. If the sides of the airplane are tied together in any way you have lost the abilty to control the airplane on one side, thus losing the redudancy that saved my airplane this past weekend. With a dual reciever system or a powerbox system you have a FULL redundant system. Aw, BTW...remember that these planes carry GAS...when they hit the ground hard that gas is just a little flammable. heh I think about how stuff can fail, and I eliminate that possibility from the equation when the airplane is on the bench when being built. That thinking has served me very well, and while this is an expensive hobby, it hasn't cost me an airplane due to any malfunction of the equipment in 19 years of flying everything from trainers to racers, pattern planes, and IMAC Scale aerobatic miniature aircraft. Not one single equipment related crash. I simply will not fly these things unless I am convinced they are 100% safe.