I see where one would think of the RAH-66, however there is no doubt that this NOT the comanche.The comanche had an enclosed tail. This helicopter had an open tail rotor assembly. The BH tail rotor assembly is tilted at a 20 degree angle to add lift in the tail end. In some pic's of this particular tail you can see it is tilted. If modifying a BH, one would not be able to change this angle and still be able to fly it the way it was designed to. BH also has stabilator in back, comanche does not. This is definitely a modified BH by some special OP's division using comanche principles.