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Engeu1 · 06-18-2020, 02:34 PM

Hello All,

I have a non-articulated box truck with front wind deflector.

The rear of the box ends with a typical 90 degree angle with cross section of about 5 metres / 54 sq ft, so huge opportunity to reduce drag at the back. There are several options including flow deflectors and vortex generating devices, the latter of which are very cheap and easy to fit.

However, although I've found a lot of research and articles on the benefits of the different methods, what I really need to know is in the case that I fit vortex generators anyway, how much more improvement would I get from changing the rear profile with some flow adjustment to start convergence of the airflow before the end of the box?

I don't have any particular flow adjustment in mind, but know there are quite a few products for freight trucks in the U.S. As I do quite a bit of very long distance motorway driving, any improvement effort woud be worthwhile.

Many thanks.

06-18-2020, 02:34 PM	#1 (permalink)
Engeu1 EcoModding Lurker Join Date: Jun 2020 Location: Germany Posts: 23 Thanks: 19 Thanked 16 Times in 15 Posts	Box van rear end mod Hello All, I have a non-articulated box truck with front wind deflector. The rear of the box ends with a typical 90 degree angle with cross section of about 5 metres / 54 sq ft, so huge opportunity to reduce drag at the back. There are several options including flow deflectors and vortex generating devices, the latter of which are very cheap and easy to fit. However, although I've found a lot of research and articles on the benefits of the different methods, what I really need to know is in the case that I fit vortex generators anyway, how much more improvement would I get from changing the rear profile with some flow adjustment to start convergence of the airflow before the end of the box? I don't have any particular flow adjustment in mind, but know there are quite a few products for freight trucks in the U.S. As I do quite a bit of very long distance motorway driving, any improvement effort woud be worthwhile. Many thanks.