uncle joe,
you dont say how many hours you have on an r22. Suggest strongly you practise autos with an instructor and dont worry about weight of a/c with 1 pob. minimum weight well below 12 stone! what rudder?
whatsarunway,
pilot operating manual doesn't mention 70kts or 105% rpm, 10.5 stone also above min pilot weight. redline for rpm is 90%, why try 85%.
No offence guys, but you seem to be guessing.
This could add to statistics!