Wow..., the engineering that went into these engines!

Cutaway Color Coding:
Red.................Cutaway Of Material
Yellow.............Voids, Generally Oil Lubricated
Blue................Induction Air


You might enjoy checking out these cutaways as well:

Pratt & Whitney R-4360 Wasp Major:
   • Pratt & Whitney R-4360 Wasp Major Cut...  

Wright R-3350 Cyclone:
   • Wright Cyclone R-3350 Cutaway  


Special thanks to Anderson Aeromotive for sharing this cutaway with the Reno crowd. Their web site is:
http://www.AndersonAeromotive.net

p.s., I attended the 2011 Reno Air Races for 5-1/2 days and left about 40 minutes before "the crash."