Originally Posted by
linksys
How about a totally iced up N1?
Must be significant drag , if the N1 is not rotating and accumulating ice.
i am just considering the 207mins ETOPS that some carriers use during northern
winter over NOPAC.
Again the greatest increase in drag is what's going on with ice on the inlet cowl. There really is no such thing as blocking the fan off as the air will simply spill around the cowl as much as it does with an engine shutdown. Windmill effects are insignificant compared to cowl effects.