This I have to reply to......
" frequency of control rod disconnects" .......there was just the one, and that was absolutely pilot error, this pilot trailered his machine, and ensuring the rod locknuts were In place and torqued, he failed to do. This pilot was known to be wanting in his airmanship and general machine servicings.
( Ross, how you come to "frequency" ......please explain )
2nd matter....failure of rotorheads........a yr or 2 back a fatality was investigated, it was found that a bad component design / construction was the cause. It was a component that attaches to the rotorhead. This machine was a homebuild, and the defect was internal on the component, thereby unnoticeable to inspections.
3rd matter re rotor heads......this was an imported machine, that later after delivery
The owner retrofitted a component assy, that folks feel contributed to the machines demise, as this machine sunk into deep water it was never retreaved to definitely know the cause, but this above explanation is considered .......the cause.
99.9% of gyro incidents are pilot error! that,s a fact. Gyros are made to yank and bank, problem is some pilots get ahead of their own capabilities, as well as pushing the envelope in general flying. Mistreat a gyro, it will bite you hard.
Just recently.....yr ago, gyro pilot killed by own machine, he was standing alongside machine as he started it....problem was, it was set at near full throttle, it then chewed him up as it rocketed forward.
Anytime there is a serious incidence in Australia, the governing body sends investigators to determine the cause, and what could be done to ensure it never happens again........pilot error is the hard cause to overcome. The best of training sometimes get,s lost.....just like the case above here.
Hope this helps.....Russ