I did see this, plus the short write up at Deutsches Museum Flugwerft web site. Was looking for someone with personal knowledge of this program or a technical write up of the program.

On Friday, January 29, 2016 at 7:56:26 AM UTC-8, Dan Daly wrote:
On Friday, January 29, 2016 at 10:43:28 AM UTC-5, Jonathan St. Cloud wrote:
Any idea what happened to the SB-13? How did it fly, what was it's performance...?

On Wednesday, January 27, 2016 at 4:50:40 PM UTC-8, Craig Funston wrote:

Interesting project. I remember seeing some interesting flutter modes on the similar SB-13.

https://en.wikipedia.org/wiki/Akafli...ig_SB-13_Arcus