Originally Posted by
flyinwalenda
The esc is not the problem.
What radio and receiver are you using?
My guess is the placement of the receiver and antenna inside the airframe. If the receiver and antenna are at or below the waterline you will loose or have diminished radio control the farther out you go on the water.
Try relocating the receiver so you can get at least the antenna higher up in the airframe.
Radio is a 9XR Pro using the Fly Sky 2.4GMH module (model FS-RM002). Receiver and antenna are as high above the water line as possible. We both are using this system. Using his tx and rx in my plane gives the same result. Placement in both planes is the same. We did not swap batterys or ESC. His is a 40amp with BEC built in. Mine is a 35 amp with BEC included. I am starting to suspect the BEC is overloaded.