What is the required takeoff distance to clear a 50-foot obstacle at a temperature of 23°C and a pressure altitude of 3,000 feet?

• A. 718 feet
• B. 1,331 feet
• C. 800 feet
• D. 650 feet

Answer: (A)

To determine the required takeoff distance to clear a 50-foot obstacle at a temperature of 23°C and a pressure altitude of 3,000 feet, one focuses on the impact of altitude and temperature on aircraft performance. At a pressure altitude of 3,000 feet, the aircraft faces reduced air density compared to sea level, which affects engine performance, propeller efficiency, and overall lift. Additionally, at 23°C, which is warmer than standard temperature at that altitude, further reduces the air density, thereby necessitating a longer takeoff distance compared to cooler conditions.

Calculating the required takeoff distance typically involves reference to specific aircraft performance charts or tables that account for these variables, as well as adjustments for obstacles like the 50-foot height. In this scenario, based on typical performance calculations for general aviation aircraft operating under these conditions, the correct required takeoff distance is 718 feet. This figure represents an understanding of how elevated temperatures and increased pressure altitude contribute to the aircraft's reduced performance capability during takeoff.

Thus, the choice reflecting 718 feet accurately correlates with the performance adjustments necessary for an aircraft to safely clear the specified obstacle at the given conditions.