is rear screen for real?
 

i read this article and it claims 5.5% to 6.5% reduction in drag. i searched and didn't see any info here. is this been tried here?
https://www.bnl.gov/isd/documents/78582.pdf
i would like to give it a shot if it sounds like a realistic figure.
i also like the boat tail figure improvement of "22.6%. At aft rear fairing length being 25% of its full length vehicle model drag factor is reduced by 16.1%."
i am new to all this so if i am missing something, let me know.

?
 

It's real.They're duplicating experimental research conducted in the mid-1930s and late-1960s,all proven.
The thing about the screen though,is that it only delivers these numbers at zero-yaw.Once you get into a crosswind (which is most of the time) the performance falls off.

So I'm looking at that report and a couple things jump out at me:

Much of it looks familiar, like work that has already been done.

It's a U.S. Dept. of Energy sponsored work but done in a scale wind tunnel in Ukraine? :confused: So I look up this program:

http://i146.photobucket.com/albums/r...cher/alice.jpg :confused:

So the U.S. taxpayer is paying for former Soviet weapons scientists to replicate work that's already been done. Do I have that right?

Re: screen: they're reporting reduced drag even in yaw.

there seems to be a lot of fluff, that's why i posted this and wondered the same thing.

in yaw
 

In yaw,the windward flow will be directed inside the screen,to be blasted out top,bottom,and other side,creating a transverse flow jet.Doesn't sound good.
A breeding ground for vorticity.