For an airport at 4,000 ft pressure altitude and 12 degrees C, how far would the flight cover?

To determine how far the flight would cover, we must consider a few key factors: the airport's pressure altitude, temperature, and the aircraft's performance characteristics at that altitude and temperature.

In this scenario, the airport sits at a pressure altitude of 4,000 feet and a temperature of 12 degrees Celsius. At higher altitudes, the air is less dense, which can affect aircraft performance including takeoff distance, climb ability, and overall range.

To calculate the distance covered, we often use performance charts provided by the aircraft manufacturer, as these charts take into account the weight of the aircraft, the altitude, and the temperature. Given the specific conditions stated in the question, we refer to these performance parameters.

The selected answer indicates a calculation that aligns well with the expected performance of an aircraft under those conditions. Specifically, 8.5 miles takes into account the standard distance that various general aviation aircraft could typically cover over flat terrain or within specific operational parameters from a takeoff roll at a pressure altitude of 4,000 feet in moderately warm temperature.

This distance is plausible based on the aircraft's performance figures, considering factors such as climb speed and climb gradient can produce a range of distances covered horizontally while ascending to a higher altitude.