So this turns into a different kettle of fish, or is that barrel of monkeys?
I'm perfectly happy with the physics and had pretty much figured this phenomenon out for myself. I also go to great lengths to make sure students understand the difference between over boosting (exceeding BHP limits through the gearbox), over pitching (pulling so much pitch that engine goes beyond full throttle so that rrpm droop ensues) and the difference that DA makes to the situation.
With the issue of the SN and, as Lelebebbel has observed, no change to POH or placards, I have to ask what is the motivation of the SN? Are we to try and teach students about something that is legally unusable? Is putting the information in a SN a hope that the flying community will run with it without Robinson having to formally change performance and perhaps certification data?
Please don't get me wrong, love the Robbos, lots of hours in 'em but this seems to be a tip and a wink rather than information we can actually use to educate pilots about their machines.
Thoughts anyone?