What is the crosswind component for a landing on Runway 18 if the wind is reported as 220° at 30 knots?

• A. 15 knots
• B. 19 knots
• C. 22 knots
• D. 25 knots

Answer: (B)

To determine the crosswind component for landing on Runway 18 when the wind is reported as 220° at 30 knots, we first need to establish the relationship between the wind direction and the runway heading.

Runway 18 is oriented at 180°, which means it is aligned north-south, with 180° being directly opposite 360°. The wind is coming from 220°, which is southwest of the runway heading. The angle between the wind direction and the runway can be found by subtracting the runway heading from the wind direction:

220° - 180° = 40°.

Now, to calculate the crosswind component, we can use the formula:

Crosswind = Wind Speed × sin(angle).

In this case, the wind speed is 30 knots, and the angle is 40°:

Crosswind = 30 knots × sin(40°).

Using a scientific calculator, we find that sin(40°) is approximately 0.643. Therefore, the calculation becomes:

Crosswind = 30 knots × 0.643 ≈ 19.29 knots.

This rounds to about 19 knots, confirming that the crosswind component for landing on Runway 18 when the wind is from