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.
They are the most common type of internal combustion engine, used in applications ranging from automobiles to industrial machinery. Selection Tip: Theoretically, a two stroke engine can generate twice as much power as a four stroke engine for the same engine and the same number of revolutions.