Quote:
Originally Posted by AeroMcAeroFace
Isn't the point though? When the focus is specifically targeting cooling drag it is impossible to compare a cars cooling drag by looking at its Cd in ICE and EV form. You can't get the specifics of where the change comes from, that cannot be extracted from the data and so how can it allow the observer to " 'focus' in on the specifics" ?
If I modify my car, and change the cooling system, the undertray, the wheels and the rims and then say "I have lowered drag by 10%", you don't know which mods did what amount of the change, some could be increasing drag, some could decrease.
I see the interest in the comparisons, and thanks for providing them, but I disagree completely that you can get specifics from a Cd change.
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Yes, it seems that some people struggle with the concept of what 'percentage cooling drag' means.
To make what I hope is an obvious point, even if cooling drag stayed the same, as overall Cd of cars drop, the percentage cooling drag will increase.
Most of the other data that is being quoted here is pointless since the discussion is (was?) about percentage cooling drag. And the available data shows that:
1) On current BEVs, percentage cooling drag is nowhere near zero.
2) In fact, the sample of two BEV cars for which we have percentage cooling data available shows the cooling drag to be quite high - and higher than many ICE cars.
If there is other data available on the
percentage cooling drag of BEVs, I'd love to see it.