Heat-transfer Tests of a Steel Cylinder Barrel with Aluminum Fins
This 1939 NACA technical report, issued by the National Advisory Committee for Aeronautics and preserved through NASA's Technical Reports Server, documents heat-transfer tests on a steel cylinder barrel fitted with aluminum fins, written for aircraft engine cooling engineers. Its pictures are plain engineering graphs of temperature and coefficient curves on grid paper, plus one photograph of the test rig with labelled jacket, guard rings and cold junction board; a designer might take from them the clean, sparse chart style of mid-century technical documentation.
