Nick-R,
Came across this post whilst searching for something else and can offer a third option, if it's not too late, to the ones suggested by Colin Bishop. But this will only work with transmitters intended for use with model aircraft.
This is to use a transmitter in Mode 1 and use the "V-Tail mix option".
The ESC's are plugged into receivers rudder and elevator sockets and the rudder servo into the aileron socket.
This will allow the "usual" transmitter control of rudder on the side to side movement of the right-hand stick and both motors working in the same direction controlled by the vertical moment of the left-hand stick.
The clever bit is to leave the rudder stick alone and only move the left-hand stick horizontally then the motors run in the opposite directions.
It is possible to combine stick movements;
1) Just using the L-H stick for "tank steering" with up-down for ahead-astern and sideways for motor steering
2) If a rudder only turn isn't tight enough add to motor steering
3) just use L-H stick movement to rotate "on the spot"
It saves buying an extra piece of kit, which may or may not work exactly as you want. It also avoids, assuming you can plug into the receiver sockets and battery connections correctly, any risk of damage.
You might have to alter transmitter trims and Normal/Reverse functions to get the right actions. I do recall having to swap over a motor-ESC connection once. For this reason I suggest setting up with two servos first rather than motor-ESC-batteries.
This method, which I call "TOM" (Together Or Mixed), has been described before in this Forum and in the Model Boats magazine.
Glynn Guest
