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DF-113 - Dong Feng / East Wind - Design

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.




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Page last modified: 11-07-2011 02:39:13 ZULU