Mart, your remarks are well taken.
That said, some people strive to be experts by focusing their field of vision. Others strive for a holistic perspective, albeit with a reduced depth of understanding. Different strokes for different folks.
I 'assume' (due to limited knowledge) you will agree that it would be ineffective to present an oral dissertation on quantum mechanics to a Buddhist convention.
___________ Back to the Future __________
This thread appears to be the last of the technical ones on PPRuNe-Rotorheads. Fortunately, it is kept alive because of its relationship with an active helicopter development program.
Mart, you are correct when you insist that the postings must be tightly coupled to the Sikorsky-X2. However, if all technical discussion had been excluded, the posts would have been little more than links to infrequent promotional releases, and subsequent platitudes.
Perhaps this long running thread also serves to debate technical subjects that are directly associated with the X2 and its ABC feature.
One, or more, directly related subjects might be;
The current tractor vs. pusher arguments,
Single vs. contra rotating propellers,
Airfoils and flight controls for operating in reverse velocity,
Variable speed rotor vs. Stepniewski's fixed slow speed / large chord ABC rotor.
Variable speed propeller vs. constant speed / variable pitch propeller.
None of the above can be considered as a critique of the X2 since they are little more then hypothetical considerations until proven, as is the developing X2.
Then again, perhaps those who participated in and enjoyed the earlier rotorcraft technical discussions have moved on.
Dave