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Which one of the following is not a factor for calculating speed breaches by the FMS?(a) Aircraft weight(b) CG position(c) Wind and temperature models(d) Position of the aircraftThe question was asked in an interview for job.My enquiry is from Flight Management Systems topic in chapter Autopilots and Flight Management Systems of Avionics

Answer»

Correct ANSWER is (d) Position of the aircraft

The best I can explain: The FMS continually monitors the aircraft envelope and ensures that the speed envelope restrictions are not BREACHED. It also computes the optimum speeds for the various phases of the flight profile. This is carried out taking into account factors such as: Aircraft weight – computed from a knowledge of the take-off weight and the fuel consumed (MEASURED by the ENGINE flow meters), CG position – computed from known aircraft loading and fuel consumed, Flight level and flight plan constraints, Wind and temperature models, Company route cost index.



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