I have built an enormous and heavy Lego RC tank, driven by 2 XL Motors, connected to a subtractor, one motor is for steering, the other is for propulsion. Despite having already geared down the motors to provide more torque for the vehicle, the sheer weight of the machine is too much for a single XL motor, even geared down, so the gears tend to grind a bit, but I do not want to gear the motors down any more since the vehicle already travels incredibly slowly. I am wondering if combining two XL motors for propulsion and steering (resulting in 4 XL motors in total) will give me more torque whilst retaining the same RPM.
Thanks,
Nick