A Road Not Taken - 3-Valve Airhead
Many years ago in BMWRA's On The Level magazine, Robert Hellman mentioned a rumored boxer twin prototype engine with the cylinders inclined slightly upwards. I don't recall any further information, and I long since forgot about it until I stumbled upon this patent the other day, issued to BMW in 1985.
As you can see from the image, the cylinders only look like they are inclined, due to the design of the cylinders, heads, and valve covers, and the orientation of the fins on the heads and valve covers.
Google "patent 4558676" to view the patent details and additional diagrams.
My apologies if this information has already been posted.
BMW MOA Life Member
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