Now that the easy question was answered, now lets tell him how to recover. Some planes will, and some won't without a lot of control.

Equalize the controls, then go opposite rudder and add power. Keep the attitude level with elevator and the ailerons centered. For the first couple of tries to get the combination right you may up up with a snap roll when recovering.

Again. some planes may stabilize by just centering and reversing the sticks , but some may take timing of a combination of throttle / aileron / rudder.

This maneuver takes a toll on the rudder control linkages, so make sure your hinges, horns, and servos are in good condition and can handle the torque.

And make sure you have PLENTY OF ALTITUDE!