Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Drag penalty for having a shallow rear window angle, and using spoiler to re-attach ?

Cd · 02-21-2015, 01:25 PM

I was wondering if you guys could post a chart showing the aero penalty for having to use a spoiler / trunk ( boot ) to re-attach the airflow when the rear window angle is not steep enough.

I have seen a couple of cars that had exceptional Cd figures despite having too shallow a curve to the rear window. The cars usually re-attach the air flow at the trunk/boot, or by using a spoiler.

Thanks.

02-21-2015, 01:25 PM	#1 (permalink)
Cd Ultimate Fail Join Date: Feb 2008 Location: Austin,Texas Posts: 3,585 Thanks: 2,872 Thanked 1,121 Times in 679 Posts	Drag penalty for having a shallow rear window angle, and using spoiler to re-attach ? I was wondering if you guys could post a chart showing the aero penalty for having to use a spoiler / trunk ( boot ) to re-attach the airflow when the rear window angle is not steep enough. I have seen a couple of cars that had exceptional Cd figures despite having too shallow a curve to the rear window. The cars usually re-attach the air flow at the trunk/boot, or by using a spoiler. Thanks.