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J-6 (Jian-6 Fighter aircraft 6) - Design

The original design of the J-6 supersonic fighter used a nose intake, 2 turbojet engines, a high sweptback and tapered wing and movable tailplane. Maximum speed was 1,452 km / h, service ceiling 17,500 m and maximum range 2,200 km.

In the late 1950s, China received the right to issue licenses for the MiG-19, MiG-19C and MiG-19P; engine - RD - 9B. The aircraft was in China the designation J-6 (export F-6); WP-6 engine.

In April 1958, the aircraft design office proposed the design for the DF-103 [Dong Feng / East Wind] fighter plane with all-weather operational capability. The tentative plans called for aircraft's design value of a maximum level speed of Mach 1.4, a ceiling of 17,000 meters, a climb rate greater than 70 meters/seconds, a range of 1,000 kilometers, a cruise duration 1 hour 20 minute. The aircraft's power unit is a Soviet-made RD-9? turbojet engine.

The F-6 has six attachment points for external stores (three on each wing). The outboard wing stations can carry a 250 kg bomb. The outboard wing stations can also carry a 760 or 400 liter drop tank or the CAA-1b AAM. The inboard wing stations can carry practice bombs or rocket pods with either 8 x 57mm, 16 x 57mm, or 7 x 90mm rockets. Equipped with two WP6 turbojet engines, had a maximum speed of 1,452 km/h, a service ceiling of 17,500 m, and maximum range of 2,200 km. Like the J-5, the J-6's inlets were in the nose of the aircraft.

To break the speed of sound, a swept wing design was adopted. Also, the thickness of the wings was reduced to reduce drag. The WP6 engine's configuration had was modified as well, utilizing axial-flow in its air intake as a opposed to centrifugal-flow. This improved the propulsion efficiency of the engine at supersonic speeds. Though both the thrust and afterburner thrust of the WP6 engine was the same as the WP5, the WP6 was 30% lighter in weight and had a 48% smaller diameter. As a result, the design of the aircraft, especially in the nose, was more suitable for supersonic flight.

The early J-6 A was a complete clone of the MiG-19P. The main features are: the nose is extended to install a split PR-1 radar; the camera gun is on the right of the air inlet; the airspeed tube is on the right wing tip; the fixed weapon is 2 23mm cannons. The most prominent point of the improvement of the new F-6 A modeled in Guizhou is: the airborne mine-2 radar has been improved so that it can be used to control the firing of the Pili-2 air-to-air missile in addition to shooting with aircraft guns. The types of airborne weapons of the F-6A have been expanded and its combat capabilities have been enhanced. Because of this improvement, two pylons have been added under the new J-6 armored wing for mounting the Pili-2 missile. This is also the reason why some articles believe that the J-6 A can mount the Pili-1 missiles, but due to the different control systems, neither the early nor the later J-6 A can use the P-1 missiles. In addition, the new J-6A also adopted a total of 7 improvements such as the Type I rocket ejection rescue system, the dual-engine starting system, and the application of disc brakes to the main landing gear.

The J-6 fighters had had some differences from the MiG-19C. The J-6A armament consisted of four "air-to-air» PL-1 (analog of the Soviet K-13). The Chinese developed several modifications of J-6, the first of which was the J-6III to increase engine thrust, a smaller wing span and axisymmetric inlet. China built a few hundred J-6III. The F-6 for Pakistan had different on-board equipment and the ability to use AIM-9 air-to-air missiles; and Martin Baker ejection seats were installed in the cockpit. In November 1970 the first flight was carried out a training fighter JJ-6 (FT-6).

The J-6I was successfully developed in 1966. It is a high-altitude interception type with an increased ceiling. It has three aircraft guns and an aluminum fairing cone at the air intake. Replaced with a turbojet 6-A engine with greater thrust, increased the area of ??wings and flaps, reduced unnecessary equipment and structural weight, eliminated the wing root cannon.

The J-6II first flew on March 25, 1969 for high-altitude and high-speed interception, with a practical ceiling of 17,500 meters. The gun configuration was changed to two fuselage guns, with adjustable rectifier cones in the center of the air inlet, and 8 auxiliary air inlets on the nose. Further expand the wing area and reduce the structural weight. The engine uses 2 turbojet-6A, thrust 29.42 kN, maximum speed 1548 km/h. In this picture, the airspeed tube is folded upward, which is a major feature of the J-6.

The J-6III, which flew for the first time on August 5, 1969, was a high-altitude and high-mobility type with three 30mm cannons. The air intake was the same as that of the J-6?. The turbojet 6-A engine was installed to increase the thrust-to-weight ratio of the whole machine to 0.988. Add two-stage adjustable air intake adjustment cone. The wingspan is reduced, the chord is extended, the wing area is increased, and the wing load is reduced to 6 kg/m2.

The JJ-6 was developed by the Shenyang Aircraft Factory. It began development in 1966 and flew for the first time on November 6, 1970. The front fuselage of the JJ-6 is lengthened by 375 mm, providing space for the rear cockpit. In order to improve the front view of the rear seats, the windshield and canopy are 80 mm higher than the J-6, the front seat headrest is lowered by 40 mm, and the rear seat is raised by 70 mm. The windshield is replaced with 34mm inorganic tempered glued bulletproof glass. The JJ-6 still uses turbojet-6 engines. Only one 30mm cannon is kept at the lower right of the nose, and rocket launchers can be mounted on two hanging beams under the wings. The landing parachute cabin is moved to the root of the vertical tail to avoid being washed by the jet when the parachute is deployed. Double pelvic fins are installed under the rear fuselage to ensure directional stability. The machine is equipped with aircrew communication equipment, full compass, beacon machine, and radio altimeter, and a Type 3 camera gun is installed on the upper right of the nose.