That graphic is of the German MBB TFK-90 concept for the “ACA” which later became the Eurofighter program.
The Eurofighter can be traced back to 1972 when the RAF (UK’s air force) changed their requirements for a short take off vertical landing air
superiority fighter in light of Germany and France’s needs – a joint venture, which dropped all the STOVL requirement was born.
The new project was called ECA; European Combat Aircraft. It was complicated because each of the partners wanted different things –and whatever the
politics, you can see why they wanted what they did. The ECA project evolved into the ECF (European Combat Fighter) and each of the countries put
forward proposals –two of which featured twin fins.
The British proposal was the BAe P110 (also look up P106 if you’re curious). It was a beautiful design which very superficially resembles a twin
engine/fin Saab Gripen (It is possibly related BTW, the BAe P.106 was a single engined design very similar to the Gripen and BAe assisted Saab in the
design of the Gripen…).
The German proposal was the MBB (now part of EADS) TFK-90 which also had twin fins:
The French, who needed a fighter light enough for carrier operations developed the ACX concept and had simultaneously the Mirage 4000 design.
The ACX eventually became the Rafale.
In 1981 the French left and Britian and Germany brought Italy in and yet again renamed the project: ACA which stood for Agile Combat Aircraft. There
was a big fuss about funding and the British Ministry of Defence and to a lesser extent BAe, MBB and Aeritalia ended up picking up the tab… so yet
more changes in name: Enter the EAP –Experimental Aircraft program.
The EAP was basically a BAe designed technology demonstrator and set the basic configuration for the Eurofighter. It used a Tornado fin though to
reduce costs. Something for the British to brag about: it went supersonic on its maiden flight (!).
Even as the EAP was being built, the EFA, as the overall program was then called (with the addition of Spain in the consortium) was taking shape.
So, ECA became ECF, became ACA, became EAP, became EFA, became Eurofighter…