The Mikoyan Project 1.44/1.42 is a Russian Air Force prototype fifth-generation air-superiority fighter aircraft. Apart from a number of names along the lines of "Object/Project 1.44/1.42", the aircraft is also known as the MiG-MFI. It was unofficially known for a time as "MiG-35", although MiG is now using this designation for the export version of the MiG-29OVT. The MFI has also been referred to by some sources as MiG-39. Despite the prototype status of the 1.44/1.42, NATO has assigned the reporting name "Flatpack" to this aircraft. The relationship between the 1.44 and 1.42 designations is unclear outside the military world, and these are generally used interchangeably. For simplicity, the 1.44 designation is used throughout this article.

• Crew: 1
• Length: 19 m (63 ft)
• Wingspan: 15 m (50 ft)
• Height: 4.50 m (15 ft)
• Wing area: m² (ft²)
• Empty weight: 18,000 kg (40,000 lb)
• Max takeoff weight: 35,000 kg (77,000 lb)
• Powerplant: 2× Lyulka AL-41F afterburning turbofans, 176 kN (39,680 lb) each

• Maximum speed: Mach 2.6 (2761.2 km/h, 1716 mph)
• Range: 4,000 km (2,500 mi)
• Service ceiling: 17,000 m (55,720 ft)
• Rate of climb: m/s (ft/min)
• Wing loading: kg/m² (lb/ft²)

• Guns: 1× 30 mm Izhmash GSh-301 cannon
• Missiles: R-77 AA-12 Adder medium-range radar-guided missiles, R-73 AA-11 Archer short-range IR-guided missiles, K-37 long-range radar-guided missiles, K-74 short-range IR-guided missiles
• Bombs: likely any AGM or small-diameter free fall bomb in the Russian inventory

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