Pratt & Whitney R-4360 Wasp Major radial engine that powered the Convair B-36 strategic bomber.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...e_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h...ker_engine.jpg
Previously:
https://www.homemadetools.net/forum/...506#post193053
https://www.homemadetools.net/forum/...297#post154225
https://www.homemadetools.net/forum/...001#post210587
https://www.homemadetools.net/forum/...917#post210368
https://www.homemadetools.net/forum/...355#post204458