Okay, so this is a learning process for me, and I think I've made a bit of a boob.
This time I've set the colour gradients so that it's clearer to see where the air is back at 25m/s, and the wake is much smaller than original expected.
Just after the 40metre indicator on the ruler you can see that the air is back to full speed (where a normal car height would be). That makes me think that the wake is no longer effective 35 metres behind the truck.
Any thoughts?
