Given a temperature of 80°F at 4,000 ft and a weight of 2,800 lb, what is the total landing distance over a 50-foot obstacle?

To determine the total landing distance over a 50-foot obstacle, several factors come into play, including altitude, temperature, and aircraft weight.

At 4,000 feet, the air density is reduced compared to sea level due to both elevation and temperature effects. When the temperature rises (in this case, 80°F is above standard), the air density drops further. This decrease in air density results in decreased engine performance and reduced lift for the aircraft. Additionally, as the aircraft is heavier at 2,800 lb, it will require a longer landing distance, especially over an obstacle.

Calculating landing distance typically involves using performance charts that take into consideration these variables, along with the type of aircraft and specific conditions (like runway conditions and wind). The provided answer of 1,125 feet corresponds to a calculated consideration of the aircraft's weight and the environmental conditions, reflecting the increased landing distance needed to safely clear the obstacle.

To conclude, given the combination of altitude, temperature, and aircraft weight, the total landing distance over a 50-foot obstacle is accurately represented by 1,125 feet as it captures the necessary adjustments for the performance capabilities under the specified conditions.