American AI is usually American Airlines, and usually appears because of a baggage fee paid at the airport, or a purchase made during a flight. posted 09/11/2012 Helpful (4)
Electric motors are in general, a lot more efficient that internal combustion engines. An average combustion engine has about 18â20%. A formula one engine, has about 50% of an efficiency.
With his first practical engine in 1897, âDiesel proved to the world that his was the most efficient engine ever built.â Diesels are still among the most energy efficient engines available. They are widely used in large trucks, boats, earthmoving machinery, etc.