Haven't flown my Duster in a while and I'm dusting it off and getting it ready to take to the field tomorrow. The receiver has flaps connected with a y-harness, Ailerons connected with a y-harness, Elevator, Rudder, and throttle. The elevator and throttle servos flutter when turned on and the flaps don't work at all when everything else is pluged in. I've switched recievers with the same results. Also tried new servos with no luck. I've flown this plane before without any problems... so I'm at witts end now... anybody have suggestions as to what's going on. Thanks

How long is a while??

Only the battery and transmiter left to check
Assuming those are good

I'd pull everything out and plug one servo in at a time until the problem shows itself,, you could have a single or mutiple servos that look like they're working, but are causing the problem

good luck

Sounds like a bad connection or two. Do you have any extensions on the servo leads? If so, that is often a problem if they do not get disconnected and reconnected occasionally to remove any oxidation or corrosion that occurs in the connectors.

If you are 72 meg how close is the transmitter when you are checking the airplane? Now if you are overdriving the receiver all you have to do is check the flaps.....
If that is good you could have a couple of bad servos on one end or the other of your y leads.....or a bad lead....reseat the battery lead to the receiver a couple of times.....
let us know what you find

Extensions and Ys tend to get corroded after sitting around a while. I have had too many problems with Ys and never use them. Because I'm too lazy to be bothered cleaning wire plugs I solder in my own wire extensions. Try shooting some electrical terminal cleaner into your plugs and pull them apart and put them back together 10 times then try it again. Just sounds like dirty ends. Another sign o dirty leads is slow moving servos. Just an FYI.

Just guessing here, ah you said you used a Y on the flaps and I would bet you used a reversing Y as it is often required with flaps on some of these arfs.

Its my bet that this Y is the root of your problem either the connection corrosion Rodney and Gray Beard suggested or something more heinous. I am not an electronics type but I have found a number of cheapie reversing Y's to cause problems.

John

I found the price of them didn't mater. When my instructor had his hobby shop we tested 6 brand new JR Ys and 3 were bad right out of the package. Brand doesn't seem to mater. We didn't test the Futaba Ys but I have seen problems with brand new ones over the years??
From my own use I ran into the slow servo operation using the extensions on big planes. This was before they started gold plating them though and the gold plated extensions do cost quite a bit more. That's when I started soldering in my own extension wires on my servos. Not all radios will allow you to mix so a Y is often needed but as soon as a problem shows up that's the first place I look.

Ok, relax Dick, it was an honest mistake.

Thanks to all for suggestions. It turned out to be the battery. Gee... all that drinking for nothing