11

I certainly don't claim to have any special inside knowledge as to why Porsche engineers decided to route the exhaust that way, but I think that we can analyze the possibilities and trade-offs from an engineering view and perhaps see how one might come to such a conclusion. The possible options I think we can safely eliminate any front-facing exhaust ...


9

In the simplest terms possible, the windshield acts as a spoiler or fairing, pushing the air out and up as your vehicle gains speed. The air naturally will push back to be along the side of the vehicle. With the front windows open, there is enough pressure to push the air out away from the windows to give the feeling of less drag. With the rear windows, ...


4

For the angle of the rear window, vertical is basically for the load volume / carrying capacity, getting things with a high roof line opening. Well, some sedans or sedans with a hatch-back did have rear wipers...


3

Aerodynamic resistance will be having an effect here, but its unlikely to effect stability at normal road speeds. You will get airflow disturbance around the damaged area causing drag, however as for giving the car a not feeling/travelling straight type symptom.. I believe inspection and maintenance covering wheel alighnment, tyre condition, brakes and ...


3

The wheel covers, or fender skirts Wikipedia says they are commonly called, are fairings installed to reduce drag in the wheel wells and thus to increase range. According to the same Wikipedia article, the Honda Insight is the only current production car that uses them. It is not so obvious, but I would expect to see that those cars would also have "...


2

The reason for the question in the title (why vertical?) is that car has a maximum possible length if you want it to be maneuverable in tight spaces. For example, my Toyota RAV4 hybrid is approximately 4.6 meters long. Quite long, in my opinion. Compared to the Toyota Yaris I used to have, it's much less maneuverable. If the car was longer, say 5.0 meters ...


1

There are basically two options to reduce air resistance at the rear of the car to a minimum. One is to make the rear flat and vertical. That way, the air flowing over the car doesn't create any turbulence until it has "passed" the rear of the car. The other way is to make body into an airfoil shape by bringing the roof level down smoothly and raising ...


1

The most effective wheel trims for enhanced MPG are something along the lines of full racing moon discs. These are effectively a flat disc that covers the whole wheel. This eBay listing is just one example of this design of wheel trim in a form that can be quickly and simply pushed to fit, pull to remove over your wheels.


1

I dont believe adding wheel covers will make a noticeable difference to fuel economy. You would get more benefit from removing weight or drag. At the extreme end of aerodynamics, dragsters and streamliners use smooth flat discs on the wheel rims. But this may have been about stability as musch as drag. On hot rods they're commonly called moon caps. As ...


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