Overlaying a Car On the Template

[Sven7]

Ha, I know that feeling, but it's involuntary... working on homework

Clean, if you go out to about an 80% boat tail it will form enough of a "phantom boat tail" as to make the last 20% superfluous. In short, don't bother with the last 20% because the air will take care of it anyway. % points from the top of roof camber (0%) to the very rear tip of the template (100%).

[aerohead]

Originally Posted by cleanspeed1

So is the goal to make vehicle conform totally to the template shape? Some of the body shapes require a boattail that goes waaaaaaayyyy back, and may not be everyday practical or aesthetically pleasing.

I am an aero virgin, please be gentle.

This is what happens when you play with engines for the better part of your life.

Kamm,Korff,and others were pushing the concept of enough tail such that the wake area would be only 50% of the vehicles frontal area.
Kamm toyed with inflatable tails to make up the difference when away from city hazards.He was not unaware of the aero benefit of a full boat tail,but certainly realized what parking and driveways and pedestrians might be like to negotiate within the city.
You just need to weigh out your own needs and what you think you can live with.