Air/Slush LH2

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Oxidizer: Air. Oxidizer Comments: Ambient air (78 % nitrogen, 21% oxygen, etc.) is scooped up by air intakes and used in turbojet, turbofan, ramjet, scramjet, or other airbreathing engines as an oxidiser. Fuel: Slush LH2. Fuel Density: 0.085 g/cc. Fuel Freezing Point: -259 deg C. Fuel Boiling Point: -259 deg C. Slush hydrogen is formed by taking liquid hydrogen down to nearly the melting point. This produces a partly-solidified but still mobile version of the fuel with 20% greater density than liquid hydrogen itself. Proposed for use from the 1980's in air-breathing and rocket-powered single-stage-to-orbit vehicles where maximization of fuel weight to empty weight is absolutely essential. Engines Using Air/Slush LH2 Motor Thrust(vac) kN Thrust(sl) kN Isp sec Isp (sl) sec Designed for Status Scramjet 1,372.900 1,372.900 1,550   First Stages Development ended 1992 Contact us with any corrections, additions, or comments. Conditions for use of drawings, pictures, or other materials from this site.. To contact astronauts or cosmonauts. © Mark Wade, 1997 - 2008 except where otherwise noted.