Hi again,
this afternoon I went over the POH of the R-22 with my student:
Turns out the R-22 has a Power-Off Vne after all!!
However it has one only when equipped with floats (Mariner):
Vne - power on: 95 kts
Vne - power -off: 85 kts
or according to the placard for speedlimits at altitude!
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