A Comparative Study of Airborne Liquid-Hydrogen Tank Insulation
At the present time an Important cryogenic problem with missiles utilizing liquid hydrogen as a propellant Is that of propellant system insulation. These propellant systems must be insulated with a very effective thermal insulation in order to reduce propellant evaporation to an acceptable limit during prelaunch, boost, and space flight periods. The extremely low temperature and low volumetric heat of vaporization of liquid hydrogen Impose severe requirements on the physical, mechanical, and thermal behavior of the insulation. Further, insulation remaining on the vehicle during flight must be kept to a minimum weight because of the influence of weight on vehicle performance.
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