What is the crosswind component for landing on runway 17 with winds from 140 degrees at 25 knots?

To determine the crosswind component for landing on runway 17 with the wind coming from 140 degrees at 25 knots, it's essential to understand how to calculate the components of the wind relative to the runway heading.

Runway 17 has a heading of 170 degrees. The wind is coming from 140 degrees, which means it is blowing towards 320 degrees (140 degrees + 180 degrees). The angle between the wind direction and the runway heading can be calculated:

1. Calculate the angle difference:

• The wind direction of 140 degrees relative to the runway heading of 170 degrees results in a difference of 30 degrees (170 - 140 = 30 degrees).

2. Using trigonometry to find the crosswind component:

• The formula used is: Crosswind Component = Wind Speed x sin(angle).

• Here, the wind speed is 25 knots, and the angle is 30 degrees.

3. Substitute the values:

• Crosswind Component = 25 knots x sin(30 degrees) = 25 knots x 0.5 = 12.5 knots.

Rounding 12.5 knots can lead to 13 knots being the most accurate representation. This calculation demonstrates why the cross