The FG-46 (a.k.a. EPKM and SpaB-170) is a Chinese spin stabilized

solid Solid is a state of matter where molecules are closely packed and can not slide past each other. Solids resist compression, expansion, or external forces that would alter its shape, with the degree to which they are resisted dependent upon the ...

rocket motor A rocket engine is a reaction engine, producing thrust in accordance with Newton's third law by ejecting reaction mass rearward, usually a high-speed jet of high-temperature gas produced by the combustion of rocket propellants stored inside t ...

burning

HTPB Hydroxyl-terminated polybutadiene (HTPB) is an oligomer of butadiene terminated at each end with a hydroxyl functional group. It reacts with isocyanates to form polyurethane polymers. HTPB is a translucent liquid with a color similar to wax paper ...

-based composite propellant. It was developed by China Hexi Chemical and Machinery Corporation (also known as the 6th Academy of CASIC) for use in the

Long March 2E The Long March 2E, also known as the Chang Zheng 2E, CZ-2E and LM-2E, was a Chinese orbital carrier rocket from the Long March 2 family. The Long March 2E was a three-stage carrier rocket that was designed to launch commercial communications sa ...

on GTO missions. It first flew as a prototype SPTS-M14 on July 16, 1990 on the

Badr A Badr (Arabic: بدر) as a given name below is an Arabic masculine and feminine name given to the " full moon on its fourteenth night" or the ecclesiastical full moon. Badr may refer to: Places * Badr, Egypt, a city * Badr, Libya, a town in Libya ...

mission. It had its first commercial mission orbiting the

AsiaSat 2 AsiaSat 2 was a Hong Kong communications satellite, which was owned, and was initially operated, by the Hong Kong–based Asia Satellite Telecommunications Company. It was positioned in geostationary orbit at a longitude of 17° East of the Gr ...

on November 28, 1995 and exactly one month later, on December 28 its second and last mission for EchoStar 1. It has a total nominal mass of , of which is propellant load and its burn out mass is . It has an average thrust of with a

specific impulse Specific impulse (usually abbreviated ) is a measure of how efficiently a reaction mass engine, such as a rocket engine, rocket using propellant or a jet engine using fuel, generates thrust. In general, this is a ratio of the ''Impulse (physics), ...

of 292 seconds burning for 87 seconds, with a total impulse of . It is spin stabilized at 40

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or r⋅min−1) is a unit of rotational speed (or rotational frequency) for rotating machines. One revolution per minute is equivalent to hertz. Standards ISO 80000-3:2019 def ...

and the propellant mass can be reduced by up to eight months before launch or up to on the launch site.

References

Rocket engines of China Solid-fuel rockets {{rocket-stub