Great graphics Phil. Thank you for posting all these. I am a very visual person and your drawings make it easy to understand the research done by these great aerodynamacists. I know you have been saying it all along but it is still surprising to see that the ideal front end in illustration 4 has the same 0.30 cd as the regular windshield. They both decrease at about the same rate as the back is boattailed. Amazing!
I think it is time to boattail my Golf (which looks a lot like the car in illustration 4)
