Adams-Farwell Radial Rotary Engine

Thought this was interesting. Clearly it didn’t take off, but the obscure engine design looks like it did have some merits.

http://www.hemmings.com/hmn/stories/2009/07/01/hmn_feature27.html

https://youtu.be/Y0XbqHUAI-0

that is really cool

That’s a lot of rotating mass! I wonder how he went about balancing it to at least some spec so it wouldn’t fly apart!

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http://home.people.net.au/~mrbdesign/PDF/AutoTechBRV.pdf

Well this just blew my mind.

the coolest stuff is found in the comments of the articles.
this too,

also not sure where this popped up but here is one to add to the future generations of the list