Inside Out Library · ExploreDevelopment of Air-cooled Engines with Blower Cooling (1933)NASA Technical Reports Server (NTRS) · leaf 350 10 20 30 40 50 60 m/a Velocity of cooling air, itNASA Technical Reports Server (NTRS)Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.More pictures from Development of Air-cooled Engines with Blower CoolingMore like this