I'm looking forward to when gr8taz nitro gets his finished with the Power 46 electric motor. I'm fairly certain the videos were made with the OS FSa 81. Note how the model hovers, taking advantage of the large prop's air volume over the control surfaces. A smaller engine like the 46 AX will probably make it fly more scale and lack the ability to do 3D maneuvers. I bet it would still look nice in the air with standard stunts, though.

NorfolkSouthern