High Quality Content by WIKIPEDIA articles! The Heinkel HeS 011 or Heinkel-Hirth 109-011 was an advanced World War II jet engine built by Heinkel-Hirth. It featured a unique compressor arrangement, combining a three-stage axial compressor with a "diagonal" stage similar to a centrifugal compressor, along with a low-compression impeller in the intake to smooth out airflow. Much like many of the projected piston-engined late-war German designs meant to be powered with the experimental Junkers Jumo 222 multibank powerplant, many of the German jet-powered aircraft designs at the end of the war were based around the HeS 011, but like the Jumo 222, the HeS 011 engine was not ready for production before the war ended in Europe.