Preliminary Flight Tests of the N.A.C.A. Roots Type Aircraft Engine Supercharger
This 1928 report from the National Advisory Committee for Aeronautics, issued through the NASA Technical Reports Server, records preliminary flight tests of a Roots-type supercharger on an aircraft engine, written for engineers and aviation researchers. Its pictures are plain photographs of an engine installation and an aircraft, alongside technical line graphs of altitude, time, pressure and engine speed, offering a designer clean mechanical detail and sober scientific chart styling.
