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DF-113 - Dong Feng / East Wind - Design

Dongfeng 113 was a single-seat, swept-wing, high-altitude high-speed fighter aircraft used for homeland air defense and frontline operations. The nose is equipped with radar, with air intake on both sides, and the intake cone can be adjusted automatically. The wing is an arrow-shaped all-metal single wing. The airfoil is a circular arc with two edges. The airfoil has 3 blades. The inside of the trailing edge has a receding split flap. The front of the flap is linked with the aileron. Spoiler, aileron with pneumatic compensation device. Swept horizontal tail. Its body is a slender hard shell, divided into three sections.

The initial design goal of Dongfeng 113 was to achieve a maximum level flight speed of Mach 2 with a ceiling of more than 20,000 meters. Later, according to the opinion of the Science and Technology Commission, it was changed to Mach 2.5 and a ceiling of 25,000 meters-the "double two five" indicator. Its combat targets are the US F-104, F-105 fighters and B-58 supersonic bombers. It is required to have a performance advantage when fighting the two fighters mentioned above, and then intercept the bomber target. Such high-performance fighters have not even the two major aviation powers of the United States and the Soviet Union.

The DF-113 design index called for a maximum speed of Mach 2.5, a ceiling of 25,000 meters, a thrust-weight ratio reaching as high as 0.92, a maximum overload is 8G, a range of 1,430 kilometers without attached auxiliary fuel tanks, and a turning radius of 1,780 meters.

The DF-113 complete machine designs used the side mounted air ducts in the non-Eastern tradition topology, this is to load the radar, was a natural selection for the long-range interception mission. Since the radar technology was not mature, the Soviet aircraft did not install high powered radar generally on aircraft, therefore they were accustomed to selecting the nose air inlet method for maximum air admission efficiency. But at that time the Chinese aeronautical circle proposed that "is familiar with Tang poem 300, but do not do only the Mig theory" - in the JJ-1 research and development, two examples of air admission methods had proven that this research and development was successful.

The DF-113 used a monocoque prolate body in three sections, and for convenience the latter two sections may facilitate disassemble, between aircraft body and engine through importing air current heat insulation. In order to implement the dsesign's high speed capability, the wing used an angle of sweep-back of 50, like a big arrow-head. The selected wing section had small supersonic flight drag, the tip point tail thin airfoil, with a thickness ratio 5%. On the wing there were three sets of wing fences, the trailing edge inside had the backlash type opening flap. The vertical stabilizer area was very large, and guaranteed the aircraft's in high-speed flight time stability, its angle of sweep-back 57.5. The tail plane was of the all-moving type, with an angle of sweep-back of 55.

In order to implement "double 2.5" performance, the maneuverability system was unique. It was not only loaded with a belt thrust augmentation in fuselage with the "814" turbojet engine (thrust augmentation thrust 11,000 kilograms), but also equipped to boost using the "636" the liquid-propellent motor (at 18,000 meters heights, thrust 1,200 kilograms, service life surpassing 10 uses), so when needed the instantaneous acceleration or jump offers the extra power support, suited in the air fight "to snatch the position to account for the height". The two different type's engine uses the TC-l aviation fuel, avoiding design and the logistics complication.

In view of the upper air high speed operational environment's actual requirements, this design used the seal turbo-charged -like single cabin, simultaneously the cabin prevents below 280 nanometers wave lengths ultraviolet's ability (to avoid the upper air solar radiation), the wind shield glass uses ethyl alcohol anti-icing method. The cabin is equipped with the ejection lifesaving chair and the supersonic ejection protective equipment, which safeguards the pilot above an altitude of 70 meters, and over the speed 400 kilometers. This design simultaneously equips the autopilot and the manual control system, two set of control system crossing linking.

The DF-113 airborne navigation, besides ordinary measuring appliance, also provided the advanced self-guided highly systematic and the radio navigation system. The airborne air-interception radar's operating altitude range is 1,900~25,000 meters, to the large-scale bomber's detection range is 23 kilometers, the tracking distance is 17.3 kilometers; To the fighter plane the detection range is 11 kilometers, the tracking distance is 8.6 kilometers.

The DF-113 weapon systems include air-to-air missiles and aerial cannon with the primary fire control electronic accounting machine. Two air-to-air missile had a range of 10 kilometers, warhead weight of 150 kilograms, and the length of projectile was 2.5 meters. Six 30 millimeter caliber aerial cannons, with a total weight of 160 kilograms, had a rate of fire 8000 round of/score, with a maximum range 3,000 meters, and a bullet weight of 0.84 kilograms/round.

In brief, regardless of looked from the software or the hardware perspective, the East Wind 113 had capability criteria which at that time were extra-superior.

The concept of this aircraft was first proposed by the Shenyang Aircraft Design Office in the spring of 1958. At that time, it was the era of the "Great Leap Forward". The "Double Two Five" index was deviated from China's national conditions and the aviation industry. In early 1961, the designers of the Aviation Research Institute and Shenyang Aircraft Design Office established by the National Defense Science and Technology Commission were placed under the establishment of the Aviation Research Institute. The design work of Dongfeng 113 was also transferred to the Aviation Research Institute. In April 1961, according to the instructions of He Long, the Third Ministry of Machinery Industry (Three Machinery Department) clearly focused its efforts on the high-quality clearance of J-6 (Mig-19), and the trial production of Dongfeng 113 was suspended.

On June 1, 1961, the Party Committee of the National Defense Working Committee reported to the central government: "In order to shorten the front line and focus on the effort to get the MiG-19 and MiG-21 out of the fastest speed, Dongfeng 113 temporarily gave way to a proper way, and then On the basis of the successful trial production of MiG-21, Dongfeng 113 was launched. The central government approved this report. "Although the document stipulates that some of the work of Dongfeng 113 can still be continued, it has actually stopped, and it was thus discontinued.

DF-113 - Dong Feng / East Wind DF-113 - Dong Feng / East Wind DF-113 - Dong Feng / East Wind

DF-113 - Dong Feng / East Wind

DF-113 - Dong Feng / East Wind

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Page last modified: 01-08-2021 14:09:41 ZULU