What is the required ground roll for takeoff over a 50-foot obstacle at a weight of 3,200 lb, temperature of 100°F, and pressure altitude of 4,000 ft?

To determine the required ground roll for takeoff over a 50-foot obstacle at a specific weight, temperature, and pressure altitude, one must refer to the aircraft's performance charts, which provide necessary data based on various environmental conditions.

In this scenario, the aircraft's weight of 3,200 lb, high temperature of 100°F, and pressure altitude of 4,000 ft are critical factors. Higher temperatures and increased altitude both decrease air density, which in turn affects engine performance and lift generation, resulting in a longer takeoff ground roll.

Performance charts typically include information on the takeoff distance required to clear an obstacle at a given weight, altitude, and temperature. Calculating or interpolating these values using the charts for the stated conditions will yield the necessary ground roll. Given the options and the conditions provided, the answer of 1,350 feet represents the most accurate requirement based on the performance characteristics of the aircraft under those specific conditions.

The other choices either overestimate or underestimate the ground roll needed, as the factors involved naturally result in an increase in required takeoff distance due to the combination of an elevated pressure altitude and high temperature. Therefore, 1,350 feet aligns well with the expected performance metrics for the aircraft under the