J-7G
The improved J-7G first flew in 2002 and entered service in early 2003. At least 20 aircraft had been delivered to the PLAAF by October 2004. The J-7G is based on the J-7E airframe and powerplant, but upgraded with improved avionic equipment for better all-weather combat capability. The J-7G is fitted with a new indigenous pulse-Doppler fire-control radar, which is said to be a Chinese copy of the Israeli EL/M2001 optimised for PL-8B and PL-5C short-range AAMs. A new electronic countermeasures (ECM) suite includes a Type-III all aspect radar warning receiver (RWR) and chaff/flare dispenser.
The J-7G also features a one-piece front canopy to give pilot better view in close combat. A new type of communications antenna is located hehind the canopy. Additionally the J-7G might also be fitted with hamlet-mounted sight (HMS) for close air combat. As a result of the increased avionics weight, the J-7G has to remove one of its 30mm cannons, leaving only one cannon with 60 rounds.
DESIGN
The unique double-delta-shape wing of the J-7E designed by Northwest Polytechnic University (NPU) has a slightly larger wingspan and wing area, giving the J-7E a bigger internal fuel capacity and better manoeuvrability. The original WP-7B turbojet was replaced by an improved WP-13F. The J-7E is comparable in manoeuvrability and general performance to early versions of the F-16A/B, and can make a serious challenge to any modern fighter aircraft in a 'dog fight' air combat.
WEAPONS
Fixed weapon includes two 30mm Type 30-1 cannon with 60 rounds per gun in the lower sides of the fuselage. The J-7G only has one 30mm cannon. Four under-wing stores stations can carry up to 2,000kg of disposable stores (each unit rated at 500kg), typical weapons are PL-8, and PL-9 short-range AAMs, free-fall weapons such as 500, 250, 100 and 50kg bombs, and multiple launchers each carrying twelve 55mm or seven 90mm unguided rockets. Centre fuselage station and two outboard wing stations are pumped to carry 720 litre drop tanks.
AVIONICS
Avionics configuration varies on different variants.
Fire-control: Three options are available for the fire-control radar on J-7E/F-7MG series:
(1) The GEC-Marconi Super Skyranger PD fire-control radar, X-band, detect-range of 15km, look-down, shoot-down, track up to 8 targets simultaneously.
(2) The Italian Grifo-7 fire-control radar, I-band, detect-range of 55km.
(3) Indigenous Type 226 PD fire-control radar (J-7E).
(4) New indigenous PD fire-control radar (J-7G)
If necessary, the J-7E could also easily adopt the helmet-mounted sight (HMS) for better combat effectiveness.
Flight: WL-7 radio compass; 0101 HR A2 altitude radio altimeter; LTC-2 horizon gyro; XS-6 marker beacon receiver; VOR; Distance Measure Equipment (DME); Instrument Landing System (ILS), TAKAN navigation system.
Self-defence: South-West China Research Institute of Electronic Equipment KG-8602 RWR interfaced with the South-West China Research Institute of Electronic Equipment KG-8605 internal radar noise jammer and China National Import and Export Corporation GT-1 chaff/flare dispenser, and Type-602 'Odd Rods' IFF.
Avionics upgrades include a new head-up display (HUD), radar warning receiver (RWR), air data computer, GPS and inertial navigation system (INS), and a new pulse-Doppler fire-control radar based on Russian or Israeli technology.
POWERPLANT
One Liyang (LMC) Wopen-13F (R-13-300) turbojet rated at 44.1kN dry and 66.7kN with afterburning. Nose air inlet.
SPECIFICATIONS
Crew: 1
Dimensions: Wingspan: 8.32m; Length: 14.885m; Height: 4.103m
Weight: Empty: 5,292kg; Normal take-off: 7,540kg; Maximum take-off: 9,100kg
Max Speed: Mach 2.0
Radius: (Long-range interception with two AAMs and three 720 liter drop tanks at speed of Mach 1.5) 850km; (Interception with two bombs and three 720 liter drop tanks, lo-lo-hi) 550km
Range: ferry range 2,200km
Service Ceiling: 18,800m
Max Climb Rate: 195m/s (sea level)
G limit: -3 to +8 (5,000 m)
http://www.sinodefence.com/airforce/fighter/j7e.asp