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Endurance & maximum range speeds

  1. Dec 12, 2013 #1


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    Hello all...

    I know that it can be derived, from first principles, that maximum endurance and maximum range speeds are related by the factor 3^0,25.

    But I haven't been able to find a derivation. Could anyone here help...?

    Thanks in advance...
  2. jcsd
  3. Dec 12, 2013 #2


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  4. Dec 12, 2013 #3
    I think it's different for power-producing and thrust-producing powerplants.
  5. Dec 12, 2013 #4


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    The link answers the OP's question about where the "magic number" came from.

    But nothing about aircraft is that simple in real life.
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