Pardon me being a bit blunt and to the point, but it does not matter a jot what boat your speed controller is going in, and a bit less what motor you intend driving with it The speed controller is just a way of telling the motor how fast you want it to goby a cheeky little bit of electronics, the speed controller is also jolly useful because when you plug it into channel 2 of your radio receiver, ittransfers power from your main battery to the receiver and, from there to all the other servo’s, very useful Some clever design engineer incorporated a reverse facility into his design. A word of caution to end, just be a little bit canny that you don’t try to put too much power out to the motor as this power has to be regulated by a couple or transistors in the ESC itselfandmaybe, just maybe, they could cook in the event of the propellor getting snagged. If you have an ammeter, measure the current being drawn by the motor at max chat and ask the ESC maker if that is O.K.       THen, you go into the boat’s length and beam,, this only causes drag as the propellor tries to push the boat through the water making the motor’s job just that little bit harder, you can help by making the hull all nice and smooth and shiny and not having too many bits and bobs in the water.

 

 

p.s. when I said plug your ESC into your radio channel 2 output, it was because there is a convention among radio control system makers, that always the speed servo should be powered by channel 2 to avoid ambiguity…Mike Davidson …Plymouth