It has always seemed like helicopters have defied the reality of physics.  Floating, hovering, it seems that they float against all that denies what can happen, reality, fantasy.  The Osprey was even further from reality by floating and flying like an airplane.  Nothing in nature is like this vehicle.  We are going to stick with what has proven to work.  The classic helicopter, we also support the coaxial rotor concept, which increases speed.  We will watch, we will learn.