Question

Which of the following is a reason of disadvantage of cruise method 3?

(a) Increased mach number

(b) Fuel saving

(c) Increased time of flight

(d) Increased weight of aircraft

I had been asked this question during an interview for a job.

This intriguing question originated from Cruise Method 3 topic in chapter Cruising Performance of Aircraft Performance

Answer 1

Correct choice is (c) Increased time of flight

To explain: The disadvantage of cruise method 3 is that to compensate the weight of aircraft the mach number and relative airspeed are decreased and there is an increase in the time of flight thus does not making any fuel saving.