You have partial control only if you correctly seperated the flight controls between the two receivers. You also need to have a way to kill the engine available on both receivers due to have long these gas engines can fly on a tank of gas. Say if your lost throttle control of the engine in flight with the engine at 1/4 to 1/2 throttle. The engine might be able to outlast the onboard battery according to how much fuel you carry onboard.