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Old 12-06-2010, 12:52 PM   #153 (permalink)
UFO
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Quote:
Originally Posted by Old Mechanic View Post
t vago

what do you think of the rotary engine design in the linked utube video? I understand it is operating as an air driven pump in the video, but I would be interested in your opinion.

I thought the greater efficiency in a diesel was due to the higher energy content of the fuel. Measured by the energy content of the fuel alone the diesels efficiency would be more comparable to a spark ignition gasoline engine.

Also what is you opinion of the Transonic type of super critical fuel injection?

regards
Mech
The difference in energy content of gasoline and diesel is about 10%, and diesel engines are typically 30% more efficient than gassers. It's not just the fuel.

And as a matter of fact, biodiesel has about the same energy content of gasoline, and I get better than 30% more fuel mileage over an equivalent gasser. Gasser Beetles average about 26 mpg, and diesel Beetles average about 42 mpg. That's about 60% better.
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