What is the crosswind component if surface wind is reported as 045° at 10 knots for a runway aligned at 180°?

What is the crosswind component if surface wind is reported as 045° at 10 knots for a runway aligned at 180°?

• A. 7 knots
• B. 3 knots
• C. 5 knots
• D. 9 knots

Answer: (A)

To determine the crosswind component when the surface wind is reported at 045° and the runway is aligned at 180°, one must first understand the orientation of both the wind and the runway. In this scenario, the wind is coming from the northeast (045°), while the runway is aligned in a north-south direction (180°). The next step is to calculate the angle between the wind direction and the runway direction, which can be done using the following formula for crosswind component: Crosswind component = Wind speed × sin(angle) The angle between the wind (045°) and the runway (180°) can be calculated as: 180° - 45° = 135°. Now, we apply the sine function: Crosswind component = 10 knots × sin(135°). Using the sine of 135°, which is √2/2 (or approximately 0.707), the calculation yields: Crosswind component = 10 knots × 0.707 ≈ 7.07 knots. Thus, the closest answer choice to this calculation is 7 knots, which confirms the appropriate methodology for calculating the crosswind component in relation to the surface wind and the runway direction. This understanding is essential for pilots when

To determine the crosswind component when the surface wind is reported at 045° and the runway is aligned at 180°, one must first understand the orientation of both the wind and the runway.

In this scenario, the wind is coming from the northeast (045°), while the runway is aligned in a north-south direction (180°). The next step is to calculate the angle between the wind direction and the runway direction, which can be done using the following formula for crosswind component:

Crosswind component = Wind speed × sin(angle)

The angle between the wind (045°) and the runway (180°) can be calculated as:

180° - 45° = 135°.

Now, we apply the sine function:

Crosswind component = 10 knots × sin(135°).

Using the sine of 135°, which is √2/2 (or approximately 0.707), the calculation yields:

Crosswind component = 10 knots × 0.707 ≈ 7.07 knots.

Thus, the closest answer choice to this calculation is 7 knots, which confirms the appropriate methodology for calculating the crosswind component in relation to the surface wind and the runway direction. This understanding is essential for pilots when