Andy Ross wrote:
I suppose one could argue whether the computation of this number belongs in the weather code or the FDM, but leaving it in this format keeps our options open. The FDM can read it or write it without changing the meaning.
No, this calculation definitely belongs in the aerodynamic code, not the weather code. The collection efficiency of a surface is inversely proportional to the with of the surface facing the airstream: an antenna or temperature probe will ice first, followed by the tail, followed by the wings. Thin wings accumulate ice faster than fat wings.
There are also speed effects. At a certain (very fast) speed, the heat generated by the friction of the air is sufficient ot prevent icing. We also do not want the weather code to have to know about deicing equipment like heated surfaces or boots.
All the best,
David
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