The H.S.P.
Enicalyth, thank you for your contribution, I am aware of the regard this prop is held in, but have learned from several sources (including a respected tech log contributor) that the weak link in the system was the feathering button: Quote
"A common problem with the hydromatic prop was that the button wouldn't pop out. The solenoid would hold the button in, and the propeller would feather, then with the pump running, continue to drive itself out of feather again. The solution was to guard against the button, watching the propeller, and popping the feather button out by hand once the prop had feathered".
Perhaps other readers out there have experienced this inconvenient trait. I wonder if any of the A/C Handling notes mentioned it, or would the cry have been the old Cop-Out "But everybody knows about that".
Ian BB