Quote:
Originally Posted by MHR1294
Best images I can find, it's not easy to see it's shape in Yellow
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Thanks for that.
My guess - and that's all it is - was that the slots were for changing flow patterns to reduce dirt deposition, as you have said.
It's not often mentioned in discussion groups, but there is a lot of professional aerodynamic tech literature on 'soiling' - how dirt covers cars. In fact I was reading something the other day that implied the air curtains on trucks are largely for this - to keep the doors clean so signwriting isn't obscured. Looking at the trucks I've seen since, the air curtains do all seem to be aimed at the doors...