An interesting design. If I were still building model aircraft, I might build a model of this just to see how it was to fly it. The pilots' comments might be interesting.

Here's a link for more information:

https://en.wikipedia.org/wiki/Blohm_%26_Voss_BV_141

and a Google search:

https://www.google.com/search?client...sance+aircraft

Paul A.