In numbers Through the lens Video
On October 31st, 2012 the J-31, by AVIC Shenyang Aircraft Corporation, performed its maiden flight, which lasted for 10 minutes, at the firm's facilities.
The fighter is in same category along with planes such as MiG-29, MiG-35, F-35 and F-22, with its maximum weight around 24-25 tn.
![]() |
| Large internal weapons compartment (it was achieved by moving the powerplant to the tail of the plane). |
Powerplant WS-13
The J-31 will possibly carry the WS-13 powerplant (a clone of the russian RD-33/93 by Klimov). According thought to Chinese officials statements, it has many modifications and expanded service life compared to RD-33/93.
The powerplant WS-13 has a 4 stage compressor with variable step blade in the first three stages, annular combustion chamber and a two-stage turbine with non-movable mono-crystal blade. It's equipped with digital control system.
![]() |
| Powerplant characteristics (estimated): |
Maximum thrust (with afterburner) 8300 kg. Maximum thrust (without afterburner) 5040 kg. Fuel consumption with afterburner 2,05 kg/kg*h. Fuel consumption without afterburner 0,77 kg/kg*h. Bypass ratio 0,49. Length 4229 mm. Diameter 1.040 mm. Net weight 1.055 kg; Service life 1.400 h. Overhaul operation time: 700 h.
Three-view drawing

Technical specifications
| DESIGNER | Chenyang |
| COUNTRY | China |
| TYPE |
Fighter aircraft
|
| CREW | 1 |
| POWER-PLANT | Two WS-13A (RD-33/93) turbofan engines |
| Thrust, kgf | |
|
- with afterburning
|
2x8.300 (9.500) |
|
- without afterburner
|
2x5.040 |
|
DIMENSIONS
|
|
|
Length, m
|
15,47
|
|
Height, m
|
4,57
|
|
Wing span, m
|
10,70
|
| Wing area m2 |
42,70
|
| WEIGHT | |
| Maximum take-off, kg | 25.000 |
| Normal take-off, kg | 17.500 |
| Empty aircraft, kg | 12.000 |
| Internal fuel, kg | 7.500 |
| Weight of transported fuel with external tanks, l | - |
| Warload, kg | 5.897 |
| PERFORMANCE | |
| Maximum speed, km/h | 2.205 |
| Cruising speed, km/h | - |
| Maximum speed in low height, km/h | until 1.400 |
|
Combat range, km
|
1.250 |
| Range, km | 2.000 |
| Ferry range, km | 4.000 |
| Service ceiling, m | 12.000 |
| Rate of climb, m/s | 330 |
| Maximum overload, g | 9 |
| ARMAMENT | Number external hardpoints: 12 |

