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Mikoyan MiG-31 Foxhound
Mikoyan MiG-31 Foxhound


Role: Two-seat twin-engined strategic interceptor.
DESIGN FEATURES: Basic MiG-25 configuration retained, but very different aircraft, strengthened to permit supersonic flight at low altitude; more powerful engines than MiG-25; major requirement increased range, not speed; advanced digital avionics; Zaslon radar was first electronically scanned phased-array type to enter service, enabling MiG-31 to track 10 targets and engage four simultaneously, including targets below and behind its own location; fuselage weapon mountings added; crew increased to two. Wing anhedral 4 degrees from roots; sweepback approx 40 degrees on leading-edge, 32 degrees at quarter-chord, with small sharply swept wingroot extensions; all-swept tail surfaces, with twin outward canted fins and dihedral horizontal surfaces.
STRUCTURE: Airframe 50 per cent arc-welded nickel steel, 16 per cent titanium, 33 per cent light alloy; negligible composites, except for radome; three-spar wings; no wingtip fairings or mountings; small forward-hinged airbrake under front of each intake trunk; undersurface of centre-fuselage not dished between engine ducts like MiG-25; much enlarged air intakes; jet nozzles extended rearward; shallow fairing extends forward from base of each fin leading-edge; fence above each wing in line with stores pylon.
LANDING GEAR: Retractable tricycle type; offset tandem twin wheels on each main unit, retracting forward into air intake trunk, facilitate operation from unprepared ground and gravel; rearward retracting twin nosewheel unit with mudguard.
POWER PLANT: Two Aviadvigatel D-30F6 turbofans, each 151.9 kN (34,170 lb st) with afterburning; internal fuel capacity approx 20,250 litres (5350 US gallons; 4455 Imp gallons); provision for two underwing tanks, each 2500 litres (660 US gallons; 550 Imp gallons); semi-retractable flight refuelling probe on port side of front fuselage.
ACCOMMODATION: Pilot and weapon systems operator in tandem under individual rearward-hinged canopies; rear canopy has only limited side glazing and blends into shallow dorsal spine fairing which extends to forward edge of jet nozzles.
AVIONICS: Zaslon electronically scanned phased-array fire control radar (NATO 'Flash Dance') in nose, with search range of 108 nm (200 km; 124 miles) and tracking range of 65 nm (120 km; 75 miles); capable of tracking 10 targets and attacking four simultaneously; retractable infrared search/track sensor under cockpit; radar warning receivers.
ARMAMENT: Four R-33 (NATO AA-9 'Amos') semi-active radar homing long-range air-to-air missiles in pairs under fuselage; two R-40T (AA-6 'Acrid') medium-range infrared missiles on inner underwing pylons; four infrared R-60 (K-60, AA-8 'Aphid') air-to-air missiles on outer underwing pylons, in pairs. Front pair of AA-9s is semi-recessed in fuselage, rear pair on short pylons. GSh-6-23 six-barrel Gatling-type 23 mm gun inside fairing on starboard side of lower fuselage, adjacent main landing gear, with 260 rds.
Aircraft Measures:
Length: 22.688 m (74 ft 5 1/4 in)
Height: 6.15 m (20 ft 2 1/4 in)
Wingspan: 13.464 m (44 ft 2 in)
Weight empty: 21,825 kg (48,115 lb)

Aircraft Performance:
Maximum permitted Speed: Mach 2.83
Service Ceiling: 20,600 m (67,600 ft)
Range: 1780 nautical miles
Thrust: 68,340 lbs


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