Exhibits for the Inspection by the Institute of Aeronautical Science Group-JUMO 004 Jet Propelled Engine with cover removed. Design variables and the arrangement of blades on the eight-stage axial flow compressor of a Junkers Jumo, 004, turbojet engine is shown being investigated at the Aircraft Engine Research Laboratory of the National Advisory Committee for Aeronautics, Cleveland, Ohio, now known as John H. Glenn Research Center at Lewis Field.