[aerohead]

Originally Posted by khafra

http://inderscience.metapress.com/ap...lts,1:110895,1

A Rear Spoiler of a New Type that Reduces the Aerodynamic Forces on a Mini-Van

Unfortunately, I don't have a subscription to either publisher, but if you read the two abstracts together, it's clear that an advanced vortex generating design at the back of a minivan has added downforce and reduced drag.

It sounds to me like turbolator tape or any of the various marketed VG designs could possibly help the Cd of a hatchback, SUV, or van--but I'd really like to get my hands on the actual spoiler involved here. Anybody have journal access or Hualei Chen and Inchul Kim on speed-dial?

You should be able to purchase the Paper from SAE for $22 US,or get it little cheaper downloading it online from their site.It might have images such that you can reconstruct what they did.