ok, more info. using a Futaba 40Mgh set. both RED leads removed from ESC(speed controllers)
only noticable on the water, when coming out of a turn, or applying full power, she "twitches", as if a motor has cut out, or there was a lot of torque on one side. occasionly i would lose steering, only to get it back.
(also when i got her back i found the servo gears had stripped. this has never, ever happened to me before.)
one thing that crossed my mind was maybe the receiver battery was'nt up to the job.
another is that if the rudder servo was on its way out it may have "interferred" with the ESC's
query, does it matter how many turns wound round ferritr ring? and do you do it to both ESC(speed controllers)
colin