Since icing conditions are not simulated in FSX. When do you use the Wing anti ice.

Choice between 5°C or 10°C of outside temperature, some operators uses the first, other the second.Wen temperature is below that point and you see fog, clouds, light rain around you, you need antiice to be active.

Andrea, I think you're talking about engine anti-ice. The OP was about wing anti-ice.Whereas engine anti-ice is used in +10C (or +5C) and visible moisture (i.e. a lot of the time), wing anti-ice is rarely used. If you're getting serious ice on the windscreen, then you might take a look out the side window to check out the wing.

Maybe you're right, I never use it, so I can be wrong about it :-)

There's a reason why I don't turn wrenches and you don't fly. But, I would gladly fly a plane you worked on.

:D

I could be wrong, but I believe Icing Conditions are simulated in FSX, only the effect on the engines and aircraft are far less than what they should be. When you use ActiveSky or REX, the effects of icing seem to be a little more than what I'd expect them to be.Using ActiveSky Evolution and flying in reported icing conditions without engine anti-ice turned on in the NGX, I've suffered from flame outs.