John, I know "Sultan" well, in spite of his on line bluster, he is really a fine person, and quite knowledgeable within his particular field,, which has nothing to do with the care and feeding of propulsed, rigid coaxial rotors. Like some folks, anonymity helps increase his expertise, confidence and self-aggrandizement.
He is not qualified to make about half the pronouncements he makes.
Regarding the Sikorsky rigid coaxial designs that are revolutionizing helicopters, he has no practical knowledge at all. Like Percival Lowell's intricate maps of Martian canals, Sultan's intricate pronouncements on details of Raider or Defiant will prove to be pure bull.