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There are ___________ fuel flow laws.(a) one(b) two(c) three(d) fourThis question was posed to me during an interview for a job.This intriguing question comes from Range and Endurance for Aircraft with Thrust Producing Engines topic in chapter Cruising Performance of Aircraft Performance

Answer»

The correct choice is (c) three

The BEST explanation: There are three fuel flow laws. They are:

i. C=C1, here SPECIFIC fuel CONSUMPTION is constant

ii. C=C2θ^1/2M^n , here it considers temperature and effects of mach number

iii. C=C3+C4M and C=C5+C6FN, here the assumptions are taken for empirical fuel flow data.



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