Under the Junkers Entwicklungsflugzeug (Development Aircraft) project designation EF 82 appeared, the 1939/40 design for a mid-wing single-seat aircraft intended for the ground attack and dive-bomber role. As opposed to the well-known Ju 87 Stuka dive-bomber, the proposed bombload of 1,000kg (2,205Ib) was to be housed internally in the fuselage. A wide-track main undercarriage retracting into the wing roots together with a cable-snatching tail hook was to enable its use aboard aircraft carriers. A special feature of the design was that it was to be powered by a Junkers-Jumo 214 engine - a secret development of the Junkers aero-engine division whose further advancement was not supported by the RLM, and this at a time when the aircraft industry was crying out for high-performance powerplants.
The Jumo 214 featured a front annular radiator and was housed beneath along cylindrical engine cowling. Noteworthy were the two long exhaust ducts which were not a normal feature of in-line engines. Details of dimensions and performance of the EF 82 are just as little known as the RLM judgement of the project.