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.
Regarding torque characteristics, the majority of variable-speed ac drive applications fall into either variable torque or constant torque applications. Centrifugal pumps and fans are variable torque applications where most fixed-speed, energy-efficient ac motors can be used without concern of overheating.