Autosync
That looks very optimistic.
I calculate the max to be 11 degrees or 1:5.
The example by Grianger approaches the 13 degrees or 1:4.5 which is more realistic.
You can squeeze some extra fractions of a degree by slowing the MR, pulling collective and going to 90-95 kts in an R44, to get maybe to 10. 5 degrees, but 1:6 = 9.5 degrees looks bar talk to me
Delta3