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Which cruise system gives minimum fuel consumption during cruise between top of climb and top of descent? (still air, no turbulence)
  • A
    Long range.
  • B
    Maximum range.
  • C
    Holding.
  • D
    Maximum endurance.

The advantage of flying at the maximum range speed is simply that the airplane will use the least amount of fuel and therefore have the least fuel cost for a given distance.

In this case, the question asks for minimum fuel consumption for the cruise portion between top of climb and top of descent. If they ask about a defined space (from TOC to TOD) go for Maximum Range; if not, the minimum fuel burn will be Maximum Endurance.

The cruise regime that offers us the maximum range possible will naturally be the most efficient in this circumstance.

Range is the distance an aircraft can fly on the amount of fuel available.
Endurance is defined as the time an aircraft can fly on the amount of fuel available.

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