Encyclopedia Astronautica
T-7A Booster


Fourth Academy solid rocket engine. 46 kN. T-7 sounding rocket. Out of Production. Isp=209s. China's first flight solid rocket. First flight 1965. Polysulfide binder with aluminium binder fuel in case of high strength steel with a graphite throat insert.

China's first flight solid rocket motor was this 286 mm diameter engine developed for the T-7A sounding rocket. The motor used polysulfide binder with aluminium binder. The case was of high strength steel with a graphite throat insert. Fundamental problems were solved during development of this motor, among them combustion instability and grain cracking. Flight tests began in 1965. Total impulse 238 kN-s over 7.5 seconds.

Development of solid propellant motors was begun in China in 1958. The first experimental test motor, 65 mm in diameter, was fired in 1960. First test of the 286 mm motor was in 1962.

Application: T-7 sounding rocket.

Characteristics

Propellant Formulation: Polysulfide.

Status: Out of Production.
Gross mass: 150 kg (330 lb).
Unfuelled mass: 33 kg (72 lb).
Height: 1.82 m (5.98 ft).
Diameter: 0.29 m (0.94 ft).
Thrust: 46.00 kN (10,341 lbf).
Specific impulse: 209 s.
Burn time: 7.50 s.
First Launch: 1962-1966.

More... - Chronology...


Associated Countries
See also
Associated Launch Vehicles
  • T-7 Chinese sounding rocket. China's first sounding rocket and first indigenously-built sounding rocket, launched from 1960-1965. The basic vehicle consisted of a single liquid propellant stage. This was later augmented with solid propellant booster stages. Later versions dispensed with the liquid propellant stage. More...

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..

Associated Stages
Home - Browse - Contact
© / Conditions for Use