hi there; as has already been stated previously - it isnt a good idea to run 3 motors from one speed controller. It has a few disadvantages, one of the main ones is if each motor isnt fused independely before the speed controller and the prop fouls up; you will take the 3 motors out plus your speed controller and your model will be stuck in the middle of the lake. The idea of running the 2 outboard motors through 2 independent speed controllers and switching the centre motor on and off; is a good idea but it also has its drawbacks. The main drawback is the heavy amp switch which has to be used to switch the main power to your centre motor on and off. It can be done by using a heavy amp relay as well but this is another more complicated method and keeps it away from the keep it simply syndrome. Gone are the days when you could tamper with the input signal to the speed controller from your RX with a switch thus enabling you to switch the speed controller off and on without any need of any heavy amp switching gear - due to the fact that all modern day speed controllers pre-programme themselves before start up. However, there is a 3rd alternative - the only drawback is that you need 3 speed controllers and a unit from ACTion electronics called the P40 D. The P40 D is a mixer which mixes your rudder movement with your 2 outboard props so, if you turn the board, the inboard prop slows down enabling a tighter turn but there is also a plug on that unit for a 3rd centre motor which is controlled by your throttle stick movement regardless of the 2 outboard motor throttle settings.
Aye
john
Author
Topic: One or Two Esc's (Read 2231 times)