What is the maximum allowable wind speed with a crosswind limitation of 35 kts?

To determine the maximum allowable wind speed when there is a specified crosswind limitation of 35 knots, it's crucial to understand how crosswind and headwind (or tailwind) components interact during takeoff and landing operations.

In aviation, the total wind speed is a combination of the headwind or tailwind component and the crosswind component. The maximum crosswind component allowed by the aircraft's operating limitations generally guides pilots in determining safe limits for flight operations.

In this case, given a crosswind limitation of 35 knots, the total wind speed is made up of both components. The maximum allowable wind speed should include the crosswind limit itself as well as some additional margin for safety and operational effectiveness.

If we consider that the maximum wind speed includes headwind or tailwind, the reasonable approach is to ensure that the total wind speed remains manageable for safe operation. A total wind speed of 40 knots allows a crosswind of 35 knots, meaning it has a headwind component that provides additional safety margins during the critical phases of flight, such as takeoff or landing.

Thus, the choice of 40 knots maximizes allowable total wind speed while maintaining the defined crosswind limitation safely within operational parameters.