Measuring the Gas Pressure within a High-Performance Insulation Blanket

  • J. W. Price
Conference paper
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 13)


It is generally agreed that multilayer insulation systems provide excellent thermal protection for cryogenic propellants. However, if the full potential of these systems is to be realized, several requirements must be met. One requirement is that the system be designed to permit evacuation of ground-hold purge gas to a pressure of 1 × 10-4 as rapidly as possible. At that pressure, the primary modes of heat transfer are radiation and solid conduction. Pressure above that value adds a gas conductivity mode of heat transfer, thereby raising the total conductivity of the system, Since gas conductivity is high in relation to radiation and solid conduction, it is necessary first to measure the gas pressure. If the pressure is too high, the system must be modified to reduce it as rapidly as possible. This modification must be made with a minimum reduction of thermal efficiency.


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  1. 1.
    H. H. Dixon, “Structural Research and Development for Cryogenic Upper Stages,” Douglas Paper No. 3963 (Sept. 1966).Google Scholar
  2. 2.
    A. D. Little, Inc., “Liquid Propellant Losses During Space Flight,” Final Report No, ADL 65008–00–04 (Oct. 1964).Google Scholar
  3. 3.
    E. D. Marion, “High Performance Insulation System Development,” Douglas Report No. SM-48806 (Oct. 1965).Google Scholar

Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • J. W. Price
    • 1
  1. 1.McDonnell-Douglas CorporationSanta MonicaUSA

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