This page no longer updated from 31 October 2001. Latest version can be found at Lox/LNG

Oxidiser: LOX. Oxidiser Density: 1.14 g/cc. Oxidiser Freezing Point: -219.00 deg C. Oxidiser Boiling Point: -183.00 deg C.

Liquid oxygen was the earliest, cheapest, safest, and eventually the preferred oxidiser for large space launchers. Its main drawback is that it is moderately cryogenic, and therefore not suitable for military uses where storage of the fuelled missile and quick launch are required. Liquid oxygen, as normally supplied, is of 99.5 percent purity and is covered in the United States by Military Specification MIL-P-25508. High purity liquid oxygen has a light blue colour and is transparent. It has no characteristic odour. Liquid oxygen does not burn, but will support combustion vigorously. The liquid is stable; however, mixtures of fuel and liquid oxygen are shock-sensitive. Gaseous oxygen can form mixtures with fuel vapours that can be exploded by static electricity, electric spark, or flame. Liquid oxygen is obtained from air by fractional distillation. The 1959 United. States production of high-purity oxygen was estimated at nearly 2 million tonnes. The cost of liquid oxygen, at that time, ex-works, was $ 0.04 per kg. By the 1980's NASA was paying $ 0.08 per kg.

Fuel: LNG. Fuel.Comments: Liquefied natural gas - mainly methane,with traces of sulfur, etc.
Engines Using Lox/LNG

Eng-engineslink Thrust(vac)-kgf Thrust(vac)-kN Isp-sec Isp (sea level)-sec Designed for Status
RD-0149 5,000 49.00 370   Upper Stages Developed 1998-on
RD-56M LNG 7,495 73.50     Upper Stages Developed 1996-
RD-0132M 10,000 98.00     Upper Stages Design concept 1998-
RD-0144 15,000 147.00 374   Upper Stages Developed 1998-on
RD-0145 15,000 147.00 374   Upper Stages Developed 1998-on
RD-0110MD 25,000 245.00     Upper Stages Developed 1994-on
RD-0143A 35,000 343.00 370   First Stages Design concept 1998-
RD-0143 35,000 343.00 372   Upper Stages Design concept 1998-
RD-182M 89,940 882.00     First Stages Developed 1998-
RD-0229M 90,000 883.00     First Stages Developed 1997
RD-0134 207,800 2,038.00 358 316 First Stages Developed 1998-on
RD-0139 207,800 2,038.00 341 301 First Stages Developed 1998-on
RD-0140 212,700 2,086.00 349 300 Upper Stages Developed 1998-on
RD-0141 229,500 2,251.00 353 323 First Stages Developed 1998-on
RD-0142 239,900 2,353.00 369   Upper Stages Developed 1998-on

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Last update 3 May 2001.
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© Mark Wade, 2001 .