I would imagine that without the tail rotor, it’s safer for ground crews and easier to takeoff and land in tight quarters with a lot of obstacles.
Actually, the counter rotating rotors was very popular as helicopters were being developed. I seem to recall at least one early Sikorsky that was set up like this. And of course, the more modern Sikorskys like those used by the Marine Corps use counter rotating rotors, though they’re note set up as coaxial rotors.
Mark
Oh, I’m not saying it’s a bad design. I’m just saying that I’d hate to have to do the calculations to make it work.
Physics was never my favorite of the sciences...