I will certainly accept your opinion 100% if you are a real pilot and tried these figures on a real CH-47D helicopter, and they came out completely differently for you or didn’t work out at all.
If not, then I will answer in detail.
I agree with you that for early access, not all strength limitations of the helicopter design are implemented, as well as not all limitations on the helicopter systems (for example, hydraulic and fuel).
However, I am sure that in a real helicopter, the capabilities of the control system will allow you to do what you got on the virtual one. If the maneuvering characteristics differ - the radii of the trajectories of these maneuvers, angular speeds of rotation, then not significantly.
For example, the CH-53 easily performs both barrels and loops, despite the fact that it is a transport!))
The fact that no one does the aerobatic maneuvers you described on a real Chinook helicopter is a simple explanation. And you can easily figure this out yourself if you answer the question: for what task, bringing benefit according to the purpose of the helicopter, to do aerobatics on a real Chinook helicopter?
Any "loop" or "barrel" or as well as rotation around a vertical axis with exorbitant angular velocity on a real helicopter, is a "minus" of several tens of hours of the fuselage and main rotor system resource. Therefore, even on AH-64 Apache or Mi-28 99% of pilots do not train for this! It is expensive to maintain, given that the benefit of such maneuvers for a helicopter in combat is practically zero.
The only thing that can be useful and help in combat from the helicopter's aerobatics capabilities is the angular velocity of rotation along the bank (roll), and bit less often - high pitch angular velocity. This will allow you to turn away from an or obstacle (or birds, or m.be burst of small arms fire)) in time or turn around faster in a mountain gorge.
In addition to the fact that when performing "loops" and "barrels" the fuselage and the main rotor system of helicopters are excessively loaded, there may be (or may not be) interruptions in the operation of the fuel and hydraulic systems. That is, it is desirable to have these systems prepared for such aerobatics during helicopter design.
Let me remind you that in the flight model we simulate the most complete capabilities according to the aerodynamic characteristics of the helicopter and its control system.
And of course, work on improving the flight models of helicopters and their control systems is still ongoing, but this is more a refinement of "details" and not at all the aerodynamic foundations of these models. Regarding the restrictions (limitations) on destructive overload, as well as on the operation of helicopter's systems under extreme conditions will be gradually added..
PilotMi8's post in Any interesting or challenging flight dynamics? was marked as the answer