What is the total landing distance over a 50-foot obstacle at a temperature of 15°C and pressure altitude of 4,000 ft with weight of 3,000 lb and a 22 kts headwind?

• A. 1,375 feet
• B. 1,075 feet
• C. 1,175 feet
• D. 1,275 feet

Answer: (C)

To determine the total landing distance over a 50-foot obstacle under the specified conditions, several factors need to be considered, including temperature, pressure altitude, aircraft weight, wind conditions, and the specific performance characteristics of the aircraft.

At a pressure altitude of 4,000 feet and a temperature of 15°C, the aircraft’s landing performance would be affected by the reduced air density, which generally increases the landing distance required. However, the presence of a headwind of 22 knots has a significant impact because it effectively reduces the ground speed of the aircraft upon landing, thereby shortening the landing distance needed to clear obstacles.

Calculating total landing distance involves adding the required distance to come to a complete stop after clearing the 50-foot obstacle. The influence of aircraft weight is notable as well; a lighter aircraft typically has a shorter landing distance. Given the specified weight of 3,000 lb, the performance charts or calculations would likely reveal that the two main factors—the altitude's effect on performance and headwind assistance—balance each other to achieve a total landing distance that would fall within the range presented.

In this case, the computations or reference to performance data indicate that the total landing distance over the 50-foot obstacle is best represented by the option indicating