Automotive

. . . well, this was a revelation for me. Yup, an aluminum hemi head for the Dodge flathead six. Ca '48 - '49. Wouldn't this make for the coolest rod powertrain ever? Drooling, Art ...  

Here's another car that had an aluminum head OHV Hemi. Although it was a 1600cc four cylinder (2-TC). ’71 through '73. Still dream about the one I had! ...  

. . . had four-banger hemis. Can't remember if they were successful in any form of racing . . .

Art, Thanks for this info on the Chrysler Hemi prototype. Can I throw in some more? (for the complete article wtih illustrations (CLICK HERE) If you want a light engine that produces a good amount of power for its weight... you want a hemispherical combus...  

. . . from literally the beginning. My foggy memory is that an American military aviation engine - and I want to say the engine used in the F-6F Wildcat - was the first practical implementation, but don't quote me on that. Art

. . . an engine for the US military with hemispherical combustion chambers in the early '40s, but it never saw service.

I refer you to the definitive article on the subject, written by yours truly in a former lifetime, when I was known as ExcelMathMike. Cazalea Siren in Glendale ...  

. . . of the Hemi siren several years ago. Here's hoping he sees this thread and offers his perspective. Art