BOAC,
Do you use Type IV fluid in europe now? Seems to have even better holdover times than Type II.
80/20,
You are correct, but when operating in such conditions we have to accelerate the engines to a mid-power setting to centrifuge the ice off the fan every few minutes....the RR Trent has a more complex procedure but the outcome is the same. Do you have a more limiting operating procedure?
idg