The S5.92 is a Russian rocket engine, currently used on the
Fregat upper stage.
Design
S5.92 burns a
hypergolic mixture of
UDMH and
nitrogen tetroxide in the
gas-generator cycle. It has two throttle settings. The highest produces of thrust, a
specific impulse
Specific impulse (usually abbreviated ) is a measure of how efficiently a reaction mass engine (a rocket using propellant or a jet engine using fuel) creates thrust. For engines whose reaction mass is only the fuel they carry, specific impulse is ...
of 327 seconds, and a 3-second ignition transient. The lower throttle level produces of thrust, specific impulse of 316 seconds, and a 2.5 second ignition transient. It is rated for 50 ignitions, and 300 days between ignitions.
History
It was originally designed by the famous
A.M. Isayev Chemical Engineering Design Bureau
The A.M. Isayev Chemical Engineering Design Bureau (Russian: ), also known as KB KhimMash or just KBKhM, is a Russian rocket engine design and manufacturing company. It is located in the city of Korolyov. It started as the OKB-2 division of the N ...
, for the two
spacecraft
A spacecraft is a vehicle or machine designed to spaceflight, fly in outer space. A type of artificial satellite, spacecraft are used for a variety of purposes, including Telecommunications, communications, Earth observation satellite, Earth ...
of the
Phobos program. While the Mars missions were unsuccessful, the spacecraft manufacturer,
NPO Lavochkin, found a market niche for the technology. Thus, the engine was adapted for use on the optional Fregat upper stage of the
Soyuz and
Zenit launch vehicles.
See also
*
Fregat - The upper stage that is powered by the S5.92.
*
Soyuz - A medium lift rocket that uses the Fregat stage.
*
Zenit-3F - A heavy lift rocket that uses the Fregat stage.
References
External links
KB KhIMMASH Official Page (in Russian)NPO Lavochkin Fregat Page (in Russian)
Rocket engines of Russia
Rocket engines of the Soviet Union
Rocket engines using hypergolic propellant
Rocket engines using the gas-generator cycle
KB KhimMash rocket engines
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