Development of Air-cooled Engines with Blower Cooling (1933)
NASA Technical Reports Server (NTRS) · leaf 33
N.A.C.A, Teclmical Manorandum No •725 Pigs. 1,2 Figure 1.-Eight-cylinder aircraft engine in V form with cooling blower. … Figure 2.-Fin types used on test cylinders*-
NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
