IMHO,
One second is nowhere near enough.
If low inertia rotors were a good idea then:
(a) People would not continue to die following engine stoppages
(b) The R-22 wouldn't have more loss of main rotor control incidents than other teetering types
(c) We wouldn't require SFAR-73
And something else...that one second people talk about for the R22 is NOT one second for the typical high pitch settings used, thats significantly less.
Please Note:
I am not a Robinson basher, I fly both the R22 and R44 and think they are mechanically reliable helicopters. I don't quite believe what Frank Robinson says about never foreseeing the market for training helicopter but do accept it. However, knowing how little weight would have to be added to the R22 rotor system to make it a high inertia system, I am very dissappointed that Frank hasn't spend a few months over the past 25 years sorting out this fundamental design fault with his most popular product.