At 04:22 PM 12/28/03 -0800, you wrote: >the question that comes to mind right away is >HOW IS THIS PERSON MEASURING/STATING EFFICIENCY???
Not knowing any more than I do about what Mr Harris's concerns were I would have to say he was addressing mechanical efficiency rather than thermal efficiency, at least as a first concern. Among other things, slower speeds and long cutoffs virtually eliminate expansive working which translates into even more abysmal thermal efficiency. Regards, Harry