[Myrddin]

There was a question of how long that fancy double diaphragm drive that synchronizes the left/right rotors would last. My former boss was going to bid the stress analysis job. I'm not sure it was ever done as the parties interested in doing the analysis couldn't figure out how to couple the vibration signature into a sensor to monitor it. When (not if) that diaphragm fails from work hardening, the bird falls out of the sky.

[Does so]

"...When (not if) that diaphragm fails from work hardening, the bird falls out of the sky...."

Rumsfeld tried to stop the Osprey: personally, I'm pained by the many crashes and loss of scores of US Marines.

Comparing the Osprey to a helicopter doesn't account for the very few years the Osprey has been in service.