What are the vertical descent angle and rate of descent at a groundspeed of 105 knots on final approach to RWY 36?

What are the vertical descent angle and rate of descent at a groundspeed of 105 knots on final approach to RWY 36?

• A. 2.5 degrees and 500 feet per minute
• B. 3.00 degrees and 557 feet per minute
• C. 3.5 degrees and 600 feet per minute
• D. 4.0 degrees and 450 feet per minute

Answer: (B)

To determine the vertical descent angle and rate of descent during an approach, it is essential to calculate these values based on the given groundspeed. For a typical stable descent for an aircraft, a common approach angle is between 3 to 3.5 degrees, which helps in establishing a comfortable descent profile that integrates safety and efficiency. When considering a groundspeed of 105 knots, calculations indicate that a descent angle of 3.0 degrees corresponds well with a rate of descent of 557 feet per minute. The descent rate is derived from the relationship between groundspeed and the desired descent angle using the formula: Rate of Descent (feet per minute) = Groundspeed (knots) × 101.3 × sin(Angle of Descent). Using this method, a 3.0-degree descent angle yields a rate of descent that aligns with the practical approach metrics and ensures that the descent remains manageable while approaching the runway. This value of 3.0 degrees and 557 feet per minute is optimal for final approaches, aligning with standard aviation procedures and ensuring safety and precision in landing operations. Therefore, the selected answer accurately reflects both a commonly used altitude profile and a practical rate of descent for a typical approach under these conditions

To determine the vertical descent angle and rate of descent during an approach, it is essential to calculate these values based on the given groundspeed.

For a typical stable descent for an aircraft, a common approach angle is between 3 to 3.5 degrees, which helps in establishing a comfortable descent profile that integrates safety and efficiency. When considering a groundspeed of 105 knots, calculations indicate that a descent angle of 3.0 degrees corresponds well with a rate of descent of 557 feet per minute.

The descent rate is derived from the relationship between groundspeed and the desired descent angle using the formula:

Rate of Descent (feet per minute) = Groundspeed (knots) × 101.3 × sin(Angle of Descent).

Using this method, a 3.0-degree descent angle yields a rate of descent that aligns with the practical approach metrics and ensures that the descent remains manageable while approaching the runway.

This value of 3.0 degrees and 557 feet per minute is optimal for final approaches, aligning with standard aviation procedures and ensuring safety and precision in landing operations. Therefore, the selected answer accurately reflects both a commonly used altitude profile and a practical rate of descent for a typical approach under these conditions