Wind energy engine efficiency

As designed, the RP blades are essentially hollow with an internal rib structure. These rib like vents direct, mix, and control airflow more effectively which reduces the amovmt of energy needed to turn the blades and cuts back on noise. Most engine noise actually comes fi-om wind turbulence that collides with the nacelle. By directing air out the back of the fan blades, the noise can be reduced by a factor of two. And by drawing more air into the blades, engine efficiency is improved by 20%. 

Primary energy can be converted into secondary energy by energy converters like water or wind turbines, solar cells, stm collectors, furnaces, combustion engines, gas and vapor turbines, generators, fuel cells, nuclear reactors, and heat pirmps. Arrows mark such converters. Their maximrrm efficiencies, e g., how much of the... 

Reducing body weight and wind resistance will make any car more efficient. But roughly equal to the wind in eating up the car s energy is braking, and internal combustion engines cannot do much about that. 

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