Question

What is the unit of specific fuel consumption?

(a) kg/kW-sec

(b) kg/W-hr

(c) kg/hr

(d) kg/kW-hr

The question was posed to me by my school teacher while I was bunking the class.

The doubt is from Range and Endurance for Aircraft with Power Producing Engines in portion Cruising Performance of Aircraft Performance

Answer 1

The correct answer is (d) kg/kW-hr

For explanation: The unit of specific fuel consumption is given by kg/kW-hr. The formula for specific fuel consumption is C=\(\frac{Q_f}{P}\) where Qf is fuel flow rate, P is power and C is specific fuel consumption.