Question

What is the significance of third fuel flow law?

(a) Specific fuel consumption is not considered

(b) Considers temperature and effects of mach number

(c) Assumptions are taken for empirical fuel flow data

(d) Specific fuel consumption is constant

I had been asked this question during an online interview.

Enquiry is from Range and Endurance for Aircraft with Thrust Producing Engines in section Cruising Performance of Aircraft Performance

Answer 1

Right choice is (c) Assumptions are taken for empirical fuel flow data

The best I can explain: The significance of first fuel flow law is that the specific fuel consumption is constant. The significance of second fuel flow law is that it considers temperature and effects of mach number. The significance of third fuel flow law is that assumptions are taken for empirical fuel flow data.