Lippisch P 13 Nazi coal plane 3D model

https://www.cgtrader.com/3d-models/aircraft/military-aircraft/lippisch-p-13-nazi-coal-plane

The Lippisch P.12, P.13a and P.13b were related design projects for a ramjet-powered delta wing interceptor aircraft studied in 1944 by German designer Alexander Lippisch. The P.12 and P.13a were unarmed, relying on reinforced wings to ram its opponent. The P.13a and b were to be powered by powdered coal.