Doug,

The 3321 are not produced anymore the 3421's are still being produced. The 3301 replaced the 3321.

Not all of them failed on the ground and I do not remember but I think all of them failed after the battery was fully charged. I have never actually measured the voltage after a full charge but after talking to a couple of other people today I am adding the jaccio 5.1 volt regulator. (They don't make a 5.2)


Todd the 3301 works fantastic on the elevators. I have done some high speed flight with mine and some high G turns and have not had a problem with them. Vernon and I actually flew a little "sorta" combat, dog fighting stuff, and we were really yanking on the airplanes.

Harley it was Vernon's airplane that the two failed at the same time and the first thing he chaecked was the Y harness. We have all heavy duty servo leads 22 guage servo leads and good connections that are heat shrunk. Replacement servos have already been installed and there is no problem other than the 3421's. There is absolutley no binding in the linkages or the rudders. One of the servos was making a humming noise (not the normal Digital buzz) and the other made no sound at all.

I am going to watch mine carefully and add the voltage regulator.


David Reid