[JohnForde]

Here is more detail on the Zevo project. I need to keep the tail lights visible from directly behind the van. I will cover the lights with lexan and the rest with coroplast. The light issue necessitates a slope of 19 deg for 18 inches.
After that 48" doors can angle anywhere from 4.4 degrees up to 20 deg and beyond.

Could the necessary 19 deg slope might be maintain boundary flow by adding vortex generators? If so, where?

Thanks in advance.

John Forde