File:The Hydrobomb, an underwater rocket-propelled projectile. 327-96d.gif

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The Hydrobomb, an underwater rocket-propelled projectile

Description	English: During World War II the US Army Air Force (AAF) Material Command Armament Laboratory at Wright Field developed an underwater rocket-propelled projectile to be launched from aircraft flying at high speed. It was called a hydrobomb, to contrast it from Navy torpedoes which were propeller-driven. GALCIT Project #1 (the forerunner-organization to JPL) built the facility shown above, which was referred to as the Channel. It included a 500 foot long hydrodynamic tank, a rocket-driven towing carriage, and test instruments to measure hydrodynamic forces on half-scale test models of the hydrobomb. This June 1945 photograph shows the rocket carriage raised to its service position, with the Channel extending behind it.
Date	19 June 1945
Source	https://pub-lib.jpl.nasa.gov/docushare/dsweb/View/Collection-115
Author	NASA

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