The single-seat, single-engine, delta-winged Mirage IIING emerged as a further development of the "Mirage III" series by the French concern of Dassault Aviation. It incorporated the assisted Fly-By-Wire (FBW) controlling scheme ultimately used in the all-modern Mirage 2000 strike fighter and was given new canard foreplanes positioned above the air intakes to each side of the fuselage (among other refinements). All this was built into the existing airframe of the "Mirage 50" development.
The Mirage 50 was, itself, an offshoot of the Mirage V/5 attack platform line of the 1970s which continued the excellent traits of the Mirage III before it. The aircraft was given a new avionics fit (with Cyrano IV radar) as well as the SNECMA Atak 09K-50 afterburning turbojet to increase Maximum Take-Off Weight (MTOW), and thus the war load capability, as well as enhancing climb rate. Beyond the basic single-seat form, Dassault also proposed a twin-seat model to spread the pilot's workload and enhance situational awareness.
The Mirage 50 went on to see far fewer orders and production (582 units) than the Mirage III it was built from (1,422 units). Nevertheless, Dassault continued to evolve the line and additional work led to a developed form of the Mirage IIIE production model, offered as the advanced "Mirage III NG" (NG = "Nouvelle Generation" / "Next Generation").
The IIIE/IIING was given a thorough reworking of its systems and subsystems (largely taken from the Mirage 2000), carried the intake-mounted foreplanes, and continued use of the Mirage series traits - single rudder fin, tricycle undercarriage, delta-wing planform. One noticeable mainplane difference was a higher sweep angle of the leading edges near the wing roots. In addition to this, the Mirage IIING received an in-flight refueling capability similar to that of the Mirage 2000. Power stemmed from a SNECMA Atar 9K-50 afterburning turbojet engine of 15,873lb thrust output. Four weapons hardpoints were also introduced (along fuselage centerline, retaining the underwing positions as well) to broaden the aircraft's ordnance-carrying capabilities and tactical value (thanks to an increase in MTOW).
A first-flight (in prototype form) was recorded on May 27th, 1981. However, there proved little market interest in this "Advanced Mirage III" so further development on the type was abandoned with just the single, flyable prototype completed for testing. However, the work completed on this aircraft influenced the Mirage III version sold to both Brazil and Venezuela.