Slice of History: Low Temperature Propellant Tests

By Julie Cooper

Each month in “Slice of History” we’ll be featuring a historical photo from the JPL Archives. See more historical photos and explore the JPL Archives at

liquid propellant jet
Low Temperature Propellant Tests — Photograph Number 6-8

It was 1943 and JPL was at the beginning stages of rocket motor research and development.  Over the next decades, JPL would design and test rocket motors with a variety of sizes and propellants.  This small (50 pound thrust) liquid propellant jet unit was immersed in a bath of ice and salt in order to test the ignition properties of the propellants at temperatures near 0°F. 

This post was written for “Historical Photo of the Month,” a blog by Julie Cooper of JPL’s Library and Archives Group.

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    One Response to “Slice of History: Low Temperature Propellant Tests”

  1. Dmitriy Bekker Says:
    May 18th, 2011 at 9:21 pm

    I believe you mean 0 deg C or 32 deg F, NOT 0 deg F.
    0 deg F is way below the freezing point of water.

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