Using terms like "everyone", "never", "cannot ever", "ANY" seem to depict a sense of superior knowledge on the part of one who I believe does not even fly gyroplanes. So that means that folks like Doug Riley and Chuck Beatty are talking through their hat??
"Seek first to understand, then to be understood" is a good quote by Stephen Covey.
OK. Help me understand then. I am not superior to anyone. I feel I have a very thorough understanding of a rotor system on any flying machine and I have it, not because I feel I am all that and a bag-o-chips. My basis for feeling I am an expert is that I have been a continuous student of literally dozens of great teachers/instructors since 1980 +/- when I first touched the flight controls of a rotorcraft.
Chuck Beatty, Prouty, and other well respected rotorcraft patriarchs came up in an age that aligned with what was known at the time. I have a 1st edition Fundamentals In Aerodynamics textbook from Georgia Tech (circa 1925+/-). In the chapter titled "Unconventional Aircraft," it compares gyros to helicopters and says "should a helicopter's engine fail, it would most certainly tumble from the sky."
I read everything Chuck and others write, with the idea in the back of my mind, that their concrete foundations were poured in the 1920's and 30's when that GA Tech textbook was still in use. I do know that Chuck takes major issue with Instructional texts that are used and have been used to train helicopter and gyro pilots for decades. These books are the "source-control-documents" for information that the FAA and most other aviation agencies the world over use to teach, write test questions, and evaluate the knowledge of licensed pilots.
The FAA Rotorcraft Flying Handbook
The FAA Pilots Handbook of Aeronautical Knowledge
The Robinson Safety Course Book
King Schools Videos and Test Prep
US ARMY Programmed Texts for IERW
US ARMY Fundamentals Of Flight
On principle of rotor system behavior about which Chuck has not been able to convince me "he is the way, the truth, and the light..." is why he feels a gyro flies better with blades that have twist that makes tips have more pitch at the tips than at the root. I know with certainty, a blade that is twisted the other way more evenly distributes the aircraft weight along the span instead of making the tips lift all the weight. When the tips lift all the weight, the blades bend upward more and since gyro RPM may get low sometimes without any way for the pilot to quickly get RPM back, the tips may bend upward beyond the safe flying line.
In his early days, he used to fly with Hughes 269 blades mounted upside down and spun backwards to get the "wash-in" I mention above. I'll bet WaspAir's FAA Certified gyros didn't have wash-in. They most likely have washout so the weight supported doesn't bend the blades. I'll also bet he can autorotate vertically with those positively twisted blades.