330-PS-3057-4 (USN 708744):   Navy’s Hydro-Ski Experiment.  The first full-scale application of the hydro-ski was on a navy JRF-5 which was modified by an Air Force Contract.  This installation was done for the purpose of investigating the feasible for a amphibious air-sea-rescue craft.  Prior to this full-scale modification, the National Advisory Committee for Aeronautics conducted a small-scale tank-tests of the aircraft, November 17, 1952.  (5/5/2015).
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