very interesting, certainly the surface erosion behind the bond line will be averted to a great degree by the paint that we talk about. even the blade tape, but you have convinced me that blade tape would only be a last stop defence in a very erosive environment, however;
what would be the cost to go one step further with the R44 blades (say) and fill them with an inert gas?
or would the natural egress through the paint etc by the water vapor not warrant it?
i would assume that the usual incursion of water vapor is from the open end of the blade when they are static and then some interesting hydraulics when they are in motion?