Original World War 2 industrial propaganda trade magazine vintage ad for AIRESEARCH MANUFACTURING COMPANY of Los Angeles, CA.  Problem, To Get the Same U.S. Bombers to Berlin and Back Minutes Faster.  U.S. Air Forces get our big bombers ever higher with powerful superchargers which compress the oxygen-thin air of the hgih altitudes, feed it to engines in concentrated doses.  All Aluminum Intercoolers, Oil Coolers, Exit Flap Controls.  Old 1943 WW2 era advertisement.