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This in turn affects the time it will take to get where we’re going, and thus also the amount of fuel needed.Given the speed and direction of the wind (from forecasts), our desired course, and our true airspeed (from the airplane’s flight manual), the wind triangle solution tells us the necessary heading to use, and what our groundspeed will be.To adjust for this, we point the airplane in a different direction (our heading) and let the wind blow us course.Usually, some component of the wind also acts in a direction parallel to our line of flight, either slowing down (a headwind) or speeding up (a tailwind) our progress over the ground.It takes about the same number of steps, but they are quite different than those performed on the E6-B.The rest of this article compares the wind triangle solutions of these two flight computers.Although I’m mathematically inclined, the operation of the E6-B seemed a bit magical to me at first, until I realized that it literally helps you “draw” the wind triangle to scale and then take measurements from it.

To compare the E6-B and CR computers, we first need a clear understanding of the problem they are designed to solve.When flying from one point to another, we first determine the direction of the second point relative to the first with a chart and navigation protractor. If there were no wind, we could then point the airplane in that direction and fly straight there.Unfortunately, there’s usually a wind, and it’s usually coming from one side or the other, meaning that it will blow us off course.The first step is to rotate the translucent wheel so the desired true course (240°, in green) is over the “TC” marker.Now find the green radial line corresponding to the wind direction (290°) and locate where it intersects with the green circle corresponding to the wind speed (30kt).

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