Russell Kent wrote:

It may be slower, but it doesn't "ring true" to me that the cause is higher
cooling drag. Diesel engines are more efficient than gasoline engines
because they extract more of the chemical energy as useful work, and less
chemical energy is converted to waste heat. With less waste heat, their
cooling drag should be *less* than a gasoline engine's.

Well, they don't. They have a higher compression ratio, and that produces heat. The
SMA diesel is air-cooled, it produces more waste heat than an IO-540, and there's
more cooling drag than with an IO-540.

George Patterson
In Idaho, tossing a rattlesnake into a crowded room is felony assault.
In Tennessee, it's evangelism.