Nobody has defined what is the ACCEPTABLE Level of Safety Performance.
You certainly haven't.
They are extremely rare to end (that) badly, and until those 2 very recent examples, there were almost no cases, but in any case many fewer than caused by 2 engined helicopters in urban areas. Everything is possible and will occur with some frequency, it's really just a case of what that frequency is, how grave are the consequences and whether it's acceptable.
Isn't that how statistics work? Sometimes nothing bad happens for ages and then it does? The 2 cases Nubian mentions happened, despite your logic and single engined helicopters with engine problems killed people on the ground - dress it up however you like but a single engine helicopter with an engine failure over a congested area is FAR more likely to have a catastrophic outcome than a twin engine helicopter having a single engine failure........
The pedal forces are a function of the Centre of Pressure being a significant distance from the Pitch Change Axis of the TR blades, this is a function of design and is not necessary, therefore hyd assisted TR pedals are not necessary if the TR were designed to not require such large forces, which is evidently possible.
Do you mean center of pressure or do you mean aerodynamic centre? Do please explain how you will design a tail rotor system where the CP is consistently aligned with the pitch change axis - you understand that the pitching moments change with AoA????
One hopes that there are serious 'experts' considering these points.
a bit like serious politicians considering UKIPs fantasies perhaps
