Inside Out Library · Explore
Drag and Cooling with Various Forms of Cowling for a "Whirlwind" Radial Air-cooled Engine II (1930)
NASA Technical Reports Server (NTRS) · leaf 14
11 FORMS OF COWLING FOR RADIAL AIR-COOLED ENGINE—II Fig. 21.—Cowling No. 2b, six cylinders removedNASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
More pictures from Drag and Cooling with Various Forms of Cowling for a "Whirlwind" Radial Air-cooled Engine II
More like this