A four-stroke SI engine delivers a brake power of 441.6 kW with a mechanical efficiency of 85 percent. The measured fuel consumption is 160 kg of fuel in one hour and air consumption is 410 kg during one-sixth of an hour. The heating value of the fuel is 42000 kJ/kg. Calculate i) indicated power, ii) frictional power, iii) air-fuel ratio, iv) indicated thermal efficiency, and v) brake thermal efficiency.
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