Encyclopedia Astronautica
DFH-2 AKM


Fourth Academy solid rocket engine. 43.460 kN. DFH series apogee kick motor. Out of Production. Isp=287s. First flight 1984. First use in China of glass fibre wound cases, carbon/carbon nozzle throat insert material, contoured divergent nozzle.

Motors developed for geosynchronous orbit insertion of DFH series satellites. These motors marked the first use in China of glass fibre wound cases, carbon/carbon nozzle throat insert material, contoured divergent nozzle, and non-destructive test of the motor grain. First used in DFH-2 satellite in 1984, followed by the DFH-2A. Impulse accuracy (3-sigma) of 0.7%. Total impulse of 1432 kN-s over 40 seconds. Nozzle diameter 556.8 mm. The motor did not fire in 2 of 7 launches, although the precise cause is not known.

Application: DFH series apogee kick motor.

Characteristics

Propellant Formulation: HTPB.

Status: Out of Production.
Gross mass: 580 kg (1,270 lb).
Unfuelled mass: 70 kg (154 lb).
Height: 1.49 m (4.89 ft).
Diameter: 0.90 m (2.94 ft).
Thrust: 43.46 kN (9,770 lbf).
Specific impulse: 288 s.
Burn time: 40 s.
First Launch: 1975-1987.
Number: 7 .

More... - Chronology...


Associated Countries
Associated Spacecraft
  • DFH-2 Chinese military communications satellite. 7 launches, 1984.01.29 (STTW-T1) to 1991.12.28 (Zhongxing-4). The DFH-2 was a spin-stabilized, drum-shaped military communications satellite with a despun antenna, a diameter of 2.1 m, and a height of 3.1 m. More...

See also
Associated Manufacturers and Agencies
Associated Propellants
  • Solid Solid propellants have the fuel and oxidiser embedded in a rubbery matrix. They were developed to a high degree of perfection in the United States in the 1950's and 1960's. In Russia, development was slower, due to a lack of technical leadership in the area and rail handling problems. Solid propellants have the fuel and oxidiser embedded in a rubbery matrix. They were developed to a high degree of perfection in the United States in the 1950's and 1960's. In Russia, development was slower, due to a lack of technical leadership in the area and rail handling problems. More...

Bibliography
  • Huang Jianding and Ye Dingyou, "The Development of Space Solid Rocket Motors in China", Acta Astronautica, Vol 40, No. 2-8, pp. 607-612, 1997..

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