Increasing the Air Charge and Scavenging the Clearance Volume of a Compression-Ignition Engine
This is a 1934 NACA technical report, published by the US National Advisory Committee for Aeronautics for aeronautical engineers and researchers, on raising the air charge and scavenging the clearance volume in compression-ignition (diesel-type) aircraft engines. The pictures are engineering drawings of cylinder head and combustion chamber cross-sections with fuel valve and pressure indicator locations, a performance graph of mean effective pressure and fuel consumption against fuel-air ratio at several boost pressures, and a photograph of a gas sampling apparatus; a designer could take from them the clean, labelled sectional line-drawing style of period engineering documentation.
