How much ground roll is necessary for takeoff over a 50-foot obstacle if the weight is 3,200 lb and the headwind is 10 knots at a temperature of 80 degrees F?

To determine the correct amount of ground roll required for takeoff over a 50-foot obstacle given the specific parameters, we can apply the relevant performance data for the aircraft, considering factors such as weight, wind conditions, and temperature.

In this scenario, a weight of 3,200 lb, a headwind of 10 knots, and a temperature of 80 degrees F all influence the takeoff performance calculations. The headwind aids in achieving takeoff speed more quickly, thereby reducing the required ground roll.

Typically, when studying takeoff distances, charts or performance tables specific to the aircraft model are utilized, which detail the distance required for takeoff at various weights, temperatures, and wind conditions. The decrease in ground roll attributed to the headwind is crucial, as it provides additional lift through airflow over the wings, allowing for a shorter takeoff distance in the previous calculations.

The estimation from the available calculations shows that, with the parameters provided, the ground roll necessary to clear a 50-foot obstacle would be about 900 feet. This accounts for the headwind reducing the required ground speed and temperature impact on performance.

Therefore, the choice of 900 feet is consistent with the performance capabilities of the aircraft under the specified conditions and represents