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What is the value of specific fuel consumption where the fuel heating is 42,800kJ/kg and power produced is 5760 kW-hr?(a) 0.135 kg/kW-hr(b) 7.43 kg/W-hr(c) 1.546 kg/kW-hr(d) 7.43 kg/kW-hrThe question was asked at a job interview.Origin of the question is Range and Endurance for Aircraft with Power Producing Engines topic in chapter Cruising Performance of Aircraft Performance

Answer»

The correct OPTION is (d) 7.43 kg/kW-hr

Best explanation: The answer is 7.43 kg/kW-hr. GIVEN Qf=42,800 kJ/kg and P=5760 kW-hr. From the formula C=\(\FRAC{Q_f}{P}\) we will find C. On substituting we get C=\(\frac{42800}{5760}\).

On solving above equation we get the value of C=7.43 kg/kW-hr.



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