Quote:
Originally Posted by JulianEdgar
But, as you so often do, you move the goal posts wildly and then pretend we're still talking about the same thing.
We're talking about what causes the various proportions of drag on current cars, not talking about cutting off the back half of a 1930s model and pretending that the change in drag is somehow analogous to the topic.
If you want to be on the topic, why not discuss the drag/thrust pattern shown on the Jaguar, or the centreline pressures on the Hyundai?
|
Correct me if I'm mistaken, but ' What causes car drag' does not encompass the specificity with which you speak.
' Current cars' is ex post facto.
And since most of the drag of modern cars remains a function of what's NOT there, it's a perfect segue into what I posted.
Automotive drag is about pressure drag.
Pressure drag is an artifact of flow separation on the aft-body.
Separation is a function of aft-body shape.
An introduction to known shapes, devoid of separation would be fundamental to any meaningful understanding of 'car drag.'
If you want to be on topic, then discuss the highest attainable centerline aft-body pressures recognizable. You won't find them on any Jaguar or Hyundai product.