An aircraft flies from A to B, distance 155 nm, in 1 hour and 23 minutes. If there is a tailwind of 12 kts the TAS is?

  • $\begingroup$ Are you unable to calculate the ground speed from that information? Basic algebra. $\endgroup$ Mar 17, 2018 at 19:01
  • $\begingroup$ How would you calculate the speed of a vehicle from time and distance information when there is no wind? $\endgroup$ Mar 17, 2018 at 19:15
  • $\begingroup$ The TAS is not affected by the wind. The aircraft flies within the mass of air, and the TAS is the speed of the aircraft with respect to that mass of air. The only speed affected by the wind is the groundspeed... $\endgroup$
    – xxavier
    Mar 17, 2018 at 20:57

1 Answer 1


Try this: (a small amount of rounding, not considering instrument error -basic)

Speed = Distance x 60/Time (in minutes)

Speed = 155 x 60/83(minutes)

Speed = 112 nmh

Speed of 112 nmh consists of 100 kts TAS and 12 kts Tailwind.

Then, TAS = 100 kts.


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