This video covers this ground-breaking design. Cd 0.51, vs Cd 0.66 for the cars it replaced.
The DeSoto Airflow aerodynamic test mule, not shown, achieved Cd 0.244 as a 'long-tail.'
An SAE Paper was published finally, four months before the attack on Pearl Harbor. We've already discussed that elsewhere here at EcoModder.com.
https://www.curbside.tv/blog/2018/8/...rysler-airflow