Thanks for your input.The stock Yellow Bee configuration is a 4.8V battery pack which runs two motors. There is some sort of electronic speed control included, which controls yaw via differential thrust from the two motors. It's hard to tell if the two motors are in series or parallel, because they run through a weird controller. Is there an easy way to tell how many amps the motors draw at full throttle, so that I can calculate the amp load for 4 instead of 2 motors?
Thanks again for your help