I am going to Ramble on. Even with a clutch, the prop placement of Raider/Defiant is an accident waiting to happen. Unlike a Black Hawk, with a high mounted tail rotor.
Igor Sikorsky, truly an aviation genius, used two jet engines on opposite sides of the helicopter, to provide forward thrust on the ABC demonstrator. Then someone at Sikorsky had a wet dream that they would use a single large pusher prop instead.