hello
I am an aeronautical engineer and I need datas on the effect of fins and flares on the base drag of cylindrical afterbodies. Any links on the subject will be helpful
Find a copy of _Fluid Dynamic Drag_, by William F. Hoerner. The book is self-published, and the author deceased, but I think still available from family. One of the best compilations of fluid dynamic data I've ever seen. From a brief web search:
I don't know about William, but Sighard Hoerner (or perhaps it would have been Hörner if the "¨" had been more widespread?) was, I'm told, in fact a WWII German aero designer.
Best regards,
Soeren (that should have been "ø" if that had been more widespread!)