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Without using complex mathematics, please explain why best range airspeed is less than normal cruise airspeed.

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    $\begingroup$ Welcome to aviation.SE! This question might be helpful. You might also like to check out the tour if you're new to the site. $\endgroup$
    – Pondlife
    Jan 29, 2019 at 2:03
  • $\begingroup$ I thought it was a good question. Can you provide an example of how you might rephrase this to be more specific? $\endgroup$ Jan 29, 2019 at 17:05

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Normal cruise is a compromise between being fuel efficient while getting to your destination at a reasonable speed. It all comes down to drag; the faster you go the more parasitic drag you pick up and economy suffers.

Just like in your car - if you wanted to squeeze max efficiency (range) out of a trip you could drive at 55mph on the freeway. In fact you could even make it law! But, people are generally willing to burn a little more fuel to get there faster.

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    $\begingroup$ Also in commercial operation, the crew is paid by the hour and flying faster also means flying more miles each day and that means more revenue. $\endgroup$
    – Jan Hudec
    Jan 29, 2019 at 6:25
  • $\begingroup$ Yes, good point Jan! $\endgroup$ Jan 29, 2019 at 17:17

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