My aerodynamic car for today

[airbiteses]

Fiat Uno II 1989-2004 Europe and Africa
5-door 0.30 Cd
3-door Turbo 0.29 Cd

[JulianEdgar]

Porsche 924. With smoke injected into the wake, it shows that there is attached flow right to the end of the hatch.



That can be correlated with the upper body pressures shown in the advertisement.

[JulianEdgar]

The above pic is also interesting because it shows how smoke streamlines can be a bit deceptive. Here it could be thought that there is flow separation occurring over the rear hatch, but if that were the case, the wake area would obviously be bigger. In fact, the smoke injected into the wake, and its very clear upper edge, better shows the actual flow pattern.

[JulianEdgar]

You can see why they needed to add the rear spoiler for the faster Turbo model.