[William]

Dear Dan,
I believe that you are absolutely correct as that is also what my BR-2 technical notes state. How would you optimize the BR-2 as a rotary? I suggest casting the aluminum cylinders in a modern high strength aluminum alloy using investment casting to minimize final machining and maintain strength and cooling properties. Titanium liners although expensive would long outlive rings and steel liners. Of course since they would not wear at the same rate as rings that might create problems for ring life as well. With some of the modern alloy steels it might be possible to avoid forgings for parts such as the crankcase, con-rods etc... potentially the expense might balance with saving the cost of forgings. My vote would be to apply Occam's razor to the ignition and fuel systems; as suggested, keeping them simple. I'm not certain about applying motorcycle type cylinders and pistons as they are designed to cool somewhat differently than rotaries and weight is not as big a concern for them for motorcycles. This is of course an exercise, I would be much happier to find a warehouse of surplus BR-2s, or even just one. How do you think the rotary might have evolved as an engine?
Best regards,
William