In the rough crosswind component calculation, which sequence of steps is correct?

In the rough crosswind component calculation, which sequence of steps is correct?

• A. Determine wind angle; Multiply by total wind value; Add 20 to wind angle.
• B. Determine wind angle; Add 20 to wind angle; Multiply by total wind value.
• C. Multiply by wind value; Determine wind angle; Add 20 to wind angle.
• D. Determine wind angle; Add 20 to wind angle; Subtract from wind value.

Answer: (B)

The essential idea is to estimate the crosswind component by how far the wind is off the runway. You start by figuring out that wind angle. Then you apply a quick adjustment by adding 20 degrees to that angle, which is a common rough-rule tweak used to simplify the calculation. Finally, you scale that adjusted angle by the total wind speed (multiply by the wind value) to get a rough crosswind amount. This order—determine the wind angle, adjust it by adding 20, then multiply by the total wind value—is the straightforward mental-math sequence that yields a quick estimate. Changing the order (for example, multiplying first or subtracting instead of adding 20) would not align with the standard rough shortcut used here.

The essential idea is to estimate the crosswind component by how far the wind is off the runway. You start by figuring out that wind angle. Then you apply a quick adjustment by adding 20 degrees to that angle, which is a common rough-rule tweak used to simplify the calculation. Finally, you scale that adjusted angle by the total wind speed (multiply by the wind value) to get a rough crosswind amount.

This order—determine the wind angle, adjust it by adding 20, then multiply by the total wind value—is the straightforward mental-math sequence that yields a quick estimate. Changing the order (for example, multiplying first or subtracting instead of adding 20) would not align with the standard rough shortcut used here.