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      Knowledge is Power

      Scientific American August 1927

      Air-Cooled Engines for Aircraft

      An Historical Survey of the Design and Development of These Engines in America

      • By Robert Insley on August 1, 1927

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      More in the August 1927 issue of Scientific American
      • Are You Socially Intelligent?
      • Household Inventions, August 1927
      • New Trails of Ancient Man
      View Full Contents
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