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Compared with still air, the effect a headwind has on the values of the maximum range speed and the maximum gradient climb speed respectively is that:
  • A
    the maximum range speed decreases and the maximum gradient climb speed increases.
  • B
    the maximum range speed decreases and the maximum gradient climb speed is not affected.
  • C
    the maximum range speed decreases and the maximum gradient climb speed decreases.
  • D
    the maximum range speed increases and the maximum gradient climb speed is not affected.

Refer to figure.
Wind effect on Cruise

Wind does not affect endurance but is one of major factors affecting the aircraft range. To understand how the best range speed varies with wind, groundspeed should be plotted on the bottom of the Drag graph and not TAS.

Similar to no wind conditions, at the tangent of curve you can find the speed for Best Range Speed but taking into account the wind. A headwind makes the tangent hit the curve at a higher TAS and for a tailwind at a slower TAS.
Rate of Climb is air mass related, function of TAS and not affected by wind

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