Thanks Nev. I agree that of course any condensed water should not be led back and accumulated in the oil, so to make sure that does not happen the Jabiru way is the bullet proof way.
The combustion of 1 liter of gasoline produces approx 1 liter of water and there is also - depending on humidity approx 0,1-0,2 liter of water in the air taken in, but most of all water will leave via the exhaust. Only a proportinal part of the water will go with the by-pass into the crankcase and must be evacuated via the breather system.
My oil separator bottle is located just behind the cylinders on the right side of the engine. The breather hose is only 15 cm long. The hose and the separator will have at least the temperature of the oil so the water vapour will not condens here. Vapour and exhaust gases will escape out as they should. Only the oil is retained and led back via the dip stick tube
The oil going out with the by-pass is not in the form of vapour but a mist of tiny oil drops created in the crank case and carried by the by-pass gas flow out through the breather. When enterring the separator the flow velocity drops and the oil mist can settle, while the by-pass gas and water vapour will proceed out the went hose at the bottom of the cowling.
Olav.