I converted the Revell Titanic kit to r/c, mine had two 280 motors driving the outer shafts, two ACTion Pico esc's with a fixed rudder, so I steered it on the throttles. If I remember correctly I used a six volt AA sized battery pack and a micro rx.
It was a bit of a handful in a breeze, but on calm water she worked fine. I sold it to a guy in Ireland, and as far as I know, my Titanic still sails over there.
Rich