[skyking]

I have been kicking around my travel trailer design for years now, and like all things it has gone through several changes. it is a good thing I have not started construction yet!!

Here are the nuts and bolts of the latest changes.
before, I was committed to the lowest possible frontal area while keeping certain interior size goals.
This meant compromises in the shape, compromises that would not produce the lowest possible CD.
Now I see the folly in that approach.
If I increase the area from 60 to 64, for example, it means a change of around 7%.
If the new shape, (which still meets the interior size goals ), improves the CD from .30 to .27 I have made an overall improvement in CDa.
If it goes from .30 to .23 I have made some serious improvement.
Basically the more I can do to match up with the template the more I can gain, regardless of increase in frontal area.