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Non Compos Mentis
Join Date: May 2001
Location: Off the grid- Almost
Posts: 10,653
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Jim, I said that rotaries have great attributes, and that I like them. No bashing intended. But do you disagree about their efficiency?
While the horsepower per displacement is spectacular, the horsepower per fuel used is usually less than a piston engine.
You've got gobs of power from your RX-7, but I doubt you would consider it an economy car.
Good points:
-They rarely suffer a catastrophic failure. If one rotor goes, you drive home with less power.
-Smooth.
-High rpms can deliver high horspower numbers.
-Compact design.
The bad:
-The crescent shaped combustion chamber has poor volumetric efficiency. More gas, more emmissions.
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