cowana

I am making a boat poweed by two Robbe 700, 13 turn motors in parellel. Idealy, I would use two ESCs, so I can slow dowd/stop one when I go around a corner, to make it look more impressive, but I cannot do this because I can only afford one ESC. The other option is to use the one ESC, and to have a servo that turns one off when the rudder is at one of it's extremes. The only problem to this, is I am not sure if that when the motor was re-started, at full throttle, the starting 'kick' may demolish the motor mount / universal joint / driveshaft / knock the propeller off. Is this going to be a problem?

The motors will be runnning off 9.6V.

cowana

mfr02

A method that has been used is to have switches linked to the rudder servo so that the inboard motor is switched at a given point of rudder operation, but instead of chopping the inboard motor, a resistor is cut into the circuit. The atrcle that I read was many years ago, and as I recall, the writer used lengths of an element from a dead electric fire, as this allowed for easy experimentation to give the right value for his installation. As the motor is never actually stopped, the power-up is a lot more gentle.
The main difficulty is finding switches that are rated for the current your motors will pull.

cowana

I had thought about using power resistors, but fire element would be even better. I'll look into that, thanks!

cowana