The Influence of Directed Air Flow on Combustion in Spark-Ignition Engine (1939)
NASA Technical Reports Server (NTRS) · leaf 15
FIGURE 11.—Comparison of effects on cycle reproducibility of plain valves and of shrouded valves set for full axial swirl Engine speed, 1.000 r. p. m.; two spark plugs.
NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
![An illustration from Colour vision [electronic resource] : being the Tyndall lectures delivered in 1894 at the Royal Institution (1895)](https://img.insideoutlibrary.com/img/200/ia-b21285913-85-0.webp)
